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diff --git a/src/interp/bc-misc.boot b/src/interp/bc-misc.boot
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--- a/src/interp/bc-misc.boot
+++ /dev/null
@@ -1,924 +0,0 @@
--- Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
--- All rights reserved.
---
--- Redistribution and use in source and binary forms, with or without
--- modification, are permitted provided that the following conditions are
--- met:
---
---     - Redistributions of source code must retain the above copyright
---       notice, this list of conditions and the following disclaimer.
---
---     - Redistributions in binary form must reproduce the above copyright
---       notice, this list of conditions and the following disclaimer in
---       the documentation and/or other materials provided with the
---       distribution.
---
---     - Neither the name of The Numerical ALgorithms Group Ltd. nor the
---       names of its contributors may be used to endorse or promote products
---       derived from this software without specific prior written permission.
---
--- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
--- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
--- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
--- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
--- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
--- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
--- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
--- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
--- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
--- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
--- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
---Hypertex commands other than solve and matrix
-
-bcDrawIt2(ind,a,b) == STRCONC('"{}",ind,'"=",a,'"{}..",b,'"{}")
-
-bcIndefiniteIntegrate() ==
-  htInitPage("Indefinite Integration Basic Command",nil)
-  htMakePage '(
-     (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "Enter the {\em function} you would like to integrate:")
-     (text . "\newline\tab{2} ")
-     (bcStrings (45 "1/(x**2 + 6)" integrand EM))
-     (text . "\blankline")
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "Enter the {\em variable of integration}:")
-     (text . "\tab{37}")
-     (bcStrings (10 x symbol SY))
-     (doneButton "Continue" bcIndefiniteIntegrateGen))
-  htShowPage()
-
-bcIndefiniteIntegrateGen htPage ==
-  integrand := htpLabelInputString(htPage,'integrand)
-  var := htpLabelInputString(htPage,'symbol)
-  bcGen STRCONC('"integrate(",integrand,'",",var,")")
-
-
-bcDefiniteIntegrate() ==
-  htInitPage("Definite Integration Basic Command",nil)
-  htMakePage '(
-     (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "Enter the {\em function} you would like to integrate:")
-     (text . "\newline\tab{2} ")
-     (bcStrings (45 "1/(x**2 + 6)" integrand EM))
-     (text . "\blankline")
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "Enter the {\em variable of integration}:")
-     (text . "\tab{37}")
-     (bcStrings (10 x symbol SY))
-     (text . "\blankline")
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "\newline Enter {\em lower limit}:")
-     (radioButtons fromButton
-       ("" "Minus infinity" minusInfinity)
-       (""  (
-         (text . "A finite point:\tab{15}")
-         (bcStrings (10 0 from EM . bcOptional))) fromPoint))
-     (text . "\blankline")
-     (text . "\newline ")
-     (text . "\menuitemstyle{}\tab{2}")
-     (text . "\indent{2}\newline Enter {\em upper limit}:")
-     (radioButtons toButton
-       ("" "Plus infinity" plusInfinity)
-       ("" (
-         (text "A finite point:\tab{15}")
-         (bcStrings (10 y to EM . bcOptional))) toPoint))
-     (doneButton "Continue" bcDefiniteIntegrateGen))
-  htShowPage()
-
-bcDefiniteIntegrateGen htPage ==
-  integrand := htpLabelInputString(htPage,'integrand)
-  var := htpLabelInputString(htPage,'symbol)
-  lowerLimit :=
-    htpButtonValue(htPage,'fromButton) = 'fromPoint =>
-      htpLabelInputString(htPage,'from)
-    '"%minusInfinity"
-  upperLimit :=
-    htpButtonValue(htPage,'toButton) = 'toPoint =>
-      htpLabelInputString(htPage,'to)
-    '"%plusInfinity"
-  varpart := STRCONC(var,'" = ",lowerLimit,'"..",upperLimit)
-  bcGen
-   STRCONC('"integrate(",integrand,'",",varpart,'")")
-
-bcSum() ==
-  htInitPage("Sum Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em function} you would like to sum:")
-    (text . "\newline\tab{2} ")
-    (bcStrings (44 "i**3" summand EM))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em summation index}:")
-    (text . "\tab{36}")
-    (bcStrings (10 i index SY))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the limits of the sum:")
-    (text . "\newline\tab{10}{\em From:}")
-    (bcStrings (10 1 first S))
-    (text . "\tab{32}{\em To:}")
-    (text . "\tab{36}")
-    (bcStrings (10  n  last S))
-    (doneButton "Continue" bcSumGen))
-  htShowPage()
-
-bcSumGen htPage ==
-  mand := htpLabelInputString(htPage,'summand)
-  index := htpLabelInputString(htPage,'index)
-  first := htpLabelInputString(htPage,'first)
-  last := htpLabelInputString(htPage,'last)
-  bcGen STRCONC('"sum(",mand,'",",index,'" = ",first,'"..",last,'")")
-
-bcProduct() ==
-  htInitPage("Product Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-    (text . "Enter the {\em function} you would like to compute the product of:")
-    (inputStrings ("" "" 45 "i**2" mand EM))
-    (text . "\vspace{1}\newline")
-    (inputStrings ("Enter the {\em index of the product}:" "" 5 i index SY))
-    (text . "\vspace{1}\newline Enter the limits of the index:")
-    (inputStrings
-      ("\newline{\em From:}" "" 10 "1" first  EM)
-      ("{\em To:}\space{2}" "" 10  "n" last   EM))
-    (doneButton "Continue" bcProductGen))
-  htShowPage()
-
-bcProductGen htPage ==
-  mand := htpLabelInputString(htPage,'mand)
-  index := htpLabelInputString(htPage,'index)
-  first := htpLabelInputString(htPage,'first)
-  last := htpLabelInputString(htPage,'last)
-  bcGen STRCONC('"product(",mand,'",",index,'",",first,'",",last,'")")
-
-bcDifferentiate() ==
-  htInitPage("Differentiate Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em function} you want to differentiate:")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "sin(x*y)" diffand EM))
-    (text . "\blankline")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "\newline List the {\em variables} you want to differentiate with respect to?")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "x y" variables S . quoteString))
-    (text . "\blankline")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "\newline List the number of {\em times} you want to differentiate with respect to each variable (leave blank if once for each)")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "1 2" times S . quoteString)))
-  htMakeDoneButton('"Continue", 'bcDifferentiateGen)
-  htShowPage()
-
-bcDifferentiateGen htPage ==
-  mand := htpLabelInputString(htPage,'diffand)
-  varlist := bcString2WordList htpLabelInputString(htPage,'variables)
-  indexList := bcString2WordList htpLabelInputString(htPage,'times)
-  varpart :=
-    #varlist > 1 => bcwords2liststring varlist
-    first varlist
-  indexpart :=
-    null indexList => nil
-    null rest indexList => first indexList
-    #indexList = #varlist => bcwords2liststring indexList
-    bcError '"You must say how many times you want to differentiate with respect to each variable---or leave that entry blank"
-  lastPart :=
-    indexpart => STRCONC('",",indexpart,'")")
-    '")"
-  bcGen STRCONC('"differentiate(",mand,'",",varpart,lastPart)
-
-bcDraw() ==
-  htInitPage('"Draw Basic Command",nil)
-  bcHt '"What would you like to draw?"
-  bcHt '"\newline\centerline{{\em Two Dimensional Plots}}\newline"
-  bcHt '"\lispdownlink{A function of one variable}{(|bcDraw2Dfun|)}"
-  bcHt '"\space{2}y = f(x)\newline"
-  bcHt '"\lispdownlink{A parametrically defined curve}{(|bcDraw2Dpar|)}"
-  bcHt '"\space{2}(x(t), y(t))\newline"
-  bcHt '"\lispdownlink{A solution to a polynomial equation}{(|bcDraw2DSolve|)}"
-  bcHt '"\space{2} p(x,y) = 0\newline"
-  bcHt '"\vspace{1}\newline "
-  bcHt '"\centerline{{\em Three Dimensional Surfaces}}\newline\newline"
-  bcHt '"\lispdownlink{A function of two variables}{(|bcDraw3Dfun|)}"
-  bcHt '"\space{2} z = f(x,y)\newline"
-  bcHt '"\lispdownlink{A parametrically defined tube}{(|bcDraw3Dpar|)}"
-  bcHt '"\space{2}(x(t), y(t), z(t))\newline"
-  bcHt '"\lispdownlink{A parameterically defined surface}{(|bcDraw3Dpar1|)}"
-  bcHt '"\space{2}(x(u,v), y(u,v), z(u,v))\newline"
-  htShowPage()
-
-
-bcDraw2Dfun() ==
-  htInitPage('"Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Drawing {\em y = f(x)}}\newline "
-      "\centerline{where {\em y} is the dependent variable and}\newline "
-      "\centerline{where {\em x} is the independent variable}\vspace{1}\newline "
-      "\menuitemstyle{}\tab{2}What {\em function} f would you like to draw?\newline\tab{2}")
-    (bcStrings (55 "x*cos(x)" function EM))
-    (text . "\vspace{1}\newline\menuitemstyle{}\tab{2}Enter {\em dependent} variable:")
-    (bcStrings (6 y dependent SY))
-    (text . "\newline\vspace{1}\newline ")
-    (text . "\menuitemstyle{}\tab{2}Enter {\em independent} variable and {\em range}:\newline\tab{2} ")
-    (text . "{\em Variable:}")
-    (bcStrings (6 x ind SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 0 from1 F))
-    (text . "{\em to:}")
-    (bcStrings (9 30 to1 F))
-    (text
-      "\indent{0}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "Optionally enter a {\em title} for your curve:"
-      )
-    (bcStrings (15 "y = x*cos(x)" title S))
-    (text . "\indent{0}")
-    (doneButton "Continue" bcDraw2DfunGen)
-    (text . "{}"))
-  htShowPage()
-
-bcDraw2DfunGen htPage ==
-  fun := htpLabelInputString(htPage,'function)
-  dep := htpLabelInputString(htPage,'dependent)
-  ind := htpLabelInputString(htPage,'ind)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  title := htpLabelInputString(htPage,'title)
-  if (title ^= '"") then
-    titlePart := STRCONC('"{}",'"title ==_"",title,'"_"")
-    bcFinish('"draw",fun,bcDrawIt2(ind,from1,to1),titlePart)
-  else
-    bcFinish('"draw",fun,bcDrawIt2(ind,from1,to1))
-
-
-bcDraw2Dpar() ==
-  htInitPage('"Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Drawing a parametrically defined curve:}\newline "
-      "\centerline{{\em ( f1(t), f2(t) )}}\newline "
-      "\centerline{in terms of two functions {\em f1} and {\em f2}}"
-      "\centerline{and an independent variable {\em t}}\vspace{1}\newline"
-      "\menuitemstyle{}\tab{2}Enter the two {\em functions:}")
-    (text . "\newline\tab{2}{\em Function 1:}")
-    (bcStrings (44 "-9*sin(4*t/5)" function1 EM))
-    (text . "\newline\tab{2}{\em Function 2:}")
-    (bcStrings (44 "8*sin(t)" function2 EM))
-    (text ."\vspace{1}\newline\menuitemstyle{}\tab{2}Enter {\em independent} variable and range:\newline\tab{2} ")
-    (text . "{\em Variable:}")
-    (bcStrings (6 t ind SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 "-5*\%pi" from1 F))
-    (text . "{\em to:}")
-    (bcStrings (9 "5*\%pi" to1 F))
-    (text
-      "\vspace{1}\newline\menuitemstyle{}\tab{2}"
-      "Optionally enter a {\em title} for your curve:")
-    (bcStrings (15 "Lissajous" title S))
-    (text . "\indent{0}")
-    (doneButton "Continue" bcDraw2DparGen))
-  htShowPage()
-
-bcDraw2DparGen htPage ==
-  fun1 := htpLabelInputString(htPage,'function1)
-  fun2 := htpLabelInputString(htPage,'function2)
-  ind := htpLabelInputString(htPage,'ind)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  title := htpLabelInputString(htPage,'title)
-  curvePart := STRCONC('"curve(",'"{}",fun1,'",{}",fun2,'")")
-  if (title ^= '"") then
-    titlePart := (title = '"" => nil; STRCONC('"{}",'"title ==_"",title,'"_""))
-    bcFinish('"draw",curvePart,bcDrawIt2(ind,from1,to1),titlePart)
-  else
-    bcFinish('"draw",curvePart,bcDrawIt2(ind,from1,to1))
-
-bcDraw2DSolve() ==
-  htInitPage('"Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Plotting the solution to {\em p(x,y) = 0}, where} "
-      "\centerline{{\em p} is a polynomial in two variables {\em x} and {\em y}}"
-      "\vspace{1}\newline\menuitemstyle{}\tab{2}Enter the {\em polynomial} p:"
-      "\newline\tab{2}")
-    (bcStrings (40 "y**2+7*x*y-(x**3+16*x)" function EM))
-    (text . "\vspace{1}\newline\menuitemstyle{}\tab{2}Enter the {\em variables}:")
-    (text . "\newline\tab{2}{\em Variable 1:} ")
-    (bcStrings (4 x independent1 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 -15 from1 F))
-    (text . "{\em to:}")
-    (bcStrings (9 10 to1 F))
-    (text . "\newline\tab{2}{\em Variable 2:} ")
-    (bcStrings (4 y independent2 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 -10 from2 F))
-    (text . "{\em to:}")
-    (bcStrings (9 50 to2 F))
-    (text
-      "\indent{0}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "Optionally enter a {\em title} for your curve:")
-    (bcStrings (15 "" title S))
-    (text . "\indent{0}"))
-  htMakeDoneButton('"Continue",'bcDraw2DSolveGen)
-  htShowPage()
-
-bcDraw2DSolveGen htPage ==
-  fun := htpLabelInputString(htPage,'function)
-  ind1 := htpLabelInputString(htPage,'independent1)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  ind2 := htpLabelInputString(htPage,'independent2)
-  from2 := htpLabelInputString(htPage,'from2)
-  to2 := htpLabelInputString(htPage,'to2)
-  title := htpLabelInputString(htPage,'title)
-  clipPart := STRCONC('"{}",'"range==[{}",from1,'"..",to1,",{}",from2,'"..",to2,'"]")
-  if (title ^= '"") then
-    titlePart := (title = '"" => nil; STRCONC('"{}",'"title ==_"",title,'"_""))
-    bcFinish('"draw",STRCONC(fun,'" = 0 "),ind1,ind2,clipPart,titlePart)
-  else
-    bcFinish('"draw",STRCONC(fun,'" = 0 "),ind1,ind2,clipPart)
-
-bcDraw3Dfun() ==
-  htInitPage('"Three Dimensional Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Drawing {\em z = f(x,y)}}\newline "
-      "\centerline{where {\em z} is the dependent variable and}\newline "
-      "\centerline{where {\em x, y} are the independent variables}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "What {\em function} f which you like to draw?\newline\tab{2}")
-    (bcStrings (55 "exp(cos(x-y)-sin(x*y))-2" function EM))
-    (text . "\newline\menuitemstyle{}\tab{2}Enter {\em dependent} variable:")
-    (bcStrings (6 z dependent SY))
-    (text
-      "\vspace{1}\newline\menuitemstyle{}\tab{2}"
-      "Enter {\em independent} variables and ranges:\newline\tab{2} "
-      "{\em Variable:}")
-    (bcStrings (6 x independent1 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 -5 from1 F))
-    (text . "{\em to:}")
-    (bcStrings (9 5 to1 F))
-    (text . "\newline\tab{2}{\em Variable:}")
-    (bcStrings (6 y independent2 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 -5 from2 F))
-    (text . "{\em to:}")
-    (bcStrings (9 5 to2 F))
-    (text
-      "\indent{0}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "Optionally enter a {\em title} for your surface:")
-    (bcStrings (15 "" title S))
-    (text . "\indent{0}")
-    (doneButton "Continue" bcDraw3DfunGen))
-  htShowPage()
-
-bcDraw3DfunGen htPage ==
-  fun := htpLabelInputString(htPage,'function)
-  dep := htpLabelInputString(htPage,'dependent)
-  ind1 := htpLabelInputString(htPage,'independent1)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  ind2 := htpLabelInputString(htPage,'independent2)
-  from2 := htpLabelInputString(htPage,'from2)
-  to2 := htpLabelInputString(htPage,'to2)
-  title := htpLabelInputString(htPage,'title)
-  if (title ^= '"") then
-    titlePart := (title = '"" => nil;STRCONC('"{}",'"title ==_"",title,'"_""))
-    bcFinish('"draw",fun,bcDrawIt2(ind1,from1,to1),bcDrawIt2(ind2,from2,to2),titlePart)
-  else
-    bcFinish('"draw",fun,bcDrawIt2(ind1,from1,to1),bcDrawIt2(ind2,from2,to2))
-
-bcDraw3Dpar() ==
-  htInitPage('"Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Drawing a parametrically defined curve:"
-      "{\em ( f1(t), f2(t), f3(t) )}}\newline "
-      "\centerline{in terms of three functions {\em f1}, {\em f2}, and {\em f3}}\newline "
-      "\centerline{and an independent variable {\em t}}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "Enter the three {\em functions} of the independent variable:")
-    (text . "\newline\tab{2}{\em Function f1:}")
-    (bcStrings (42 "1.3*cos(2*t)*cos(4*t) + sin(4*t)*cos(t)" function1 EM))
-    (text . "\newline\tab{2}{\em Function f2:}")
-    (bcStrings  (42 "1.3*sin(2*t)*cos(4*t) - sin(4*t)*sin(t)" function2 EM))
-    (text . "\newline\tab{2}{\em Function f3:}")
-    (bcStrings  (42 "2.5*cos(4*t)" function3 EM))
-    (text ."\vspace{1}\newline\menuitemstyle{}\tab{2}Enter {\em independent} variable and range:\newline\tab{2} ")
-    (text ."{\em Variable:}")
-    (bcStrings (6 t ind SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 0 from1 F))
-    (text "{\em to:}")
-    (bcStrings (9 "4*\%pi" to1 F))
-    (text
-      "\indent{0}\vspace{1}\newline\menuitemstyle{}\tab{2} "
-      "Optionally enter a {\em title} for your surface:")
-    (bcStrings (15 "knot" title S))
-    (text . "\indent{0}")
-    (doneButton "Continue" bcDraw3DparGen))
-  htShowPage()
-
-bcDraw3DparGen htPage ==
-  fun1 := htpLabelInputString(htPage,'function1)
-  fun2 := htpLabelInputString(htPage,'function2)
-  fun3 := htpLabelInputString(htPage,'function3)
-  ind := htpLabelInputString(htPage,'ind)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  title := htpLabelInputString(htPage,'title)
-  curvePart := STRCONC('"curve(",'"{}",fun1,'",{}",fun2,'",{}",fun3,'")")
-  tubePart := '"{}tubeRadius==.25,{}tubePoints==16"
-  if (title ^= '"") then
-    titlePart := (title = '"" => nil; STRCONC('"{}",'"title ==_"",title,'"_""))
-    bcFinish('"draw",curvePart,bcDrawIt2(ind,from1,to1),tubePart,titlePart)
-  else
-    bcFinish('"draw",curvePart,bcDrawIt2(ind,from1,to1),tubePart)
-
-bcDraw3Dpar1() ==
-  htInitPage('"Draw Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text
-      "\centerline{Drawing a parametrically defined surface:}\newline "
-      "\centerline{{\em ( f1(u,v), f2(u,v), f3(u,v) )}}\newline "
-      "\centerline{in terms of three functions {\em f1}, {\em f2}, and {\em f3}}\newline "
-      "\centerline{and two independent variables {\em u} and {\em v}}\vspace{1}\newline\menuitemstyle{}\tab{2}"
-      "Enter the three {\em functions} of the independent variables:")
-    (text . "\newline\tab{2}")
-    (text . "{\em Function f1:}")
-    (bcStrings (43 "u*sin(v)" function1 EM))
-    (text . "\newline\tab{2}")
-    (text . "{\em Function f2:}")
-    (bcStrings (43 "v*cos(u)" function2 EM))
-    (text . "\newline\tab{2}")
-    (text . "{\em Function f3:}")
-    (bcStrings (43 "u*cos(v)" function3 EM))
-    (text . "\newline\menuitemstyle{}\tab{2}Enter independent {\em variables} and ranges:")
-    (text . "\newline\tab{2}")
-    (text . "{\em Variable 1:}")
-    (bcStrings (5 u ind1 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 "-\%pi" from1 F))
-    (text . "{\em to:}")
-    (bcStrings (9 "\%pi" to1 F))
-    (text . "\newline\tab{2}")
-    (text . "{\em Variable 2:}")
-    (bcStrings (5 v ind2 SY))
-    (text . "ranges {\em from:}")
-    (bcStrings (9 "-\%pi/2" from2 F))
-    (text . "{\em to:}")
-    (bcStrings (9 "\%pi/2" to2 F))
-    (text
-      "\indent{0}\newline\menuitemstyle{}\tab{2} "
-      "Optionally enter a {\em title} for your surface:")
-    (bcStrings (15 "surface" title S))
-    (text . "\indent{0}"))
-  htMakeDoneButton ('"Continue",'bcDraw3Dpar1Gen)
-  htShowPage()
-
-bcDraw3Dpar1Gen htPage ==
-  fun1 := htpLabelInputString(htPage,'function1)
-  fun2 := htpLabelInputString(htPage,'function2)
-  fun3 := htpLabelInputString(htPage,'function3)
-  ind1 := htpLabelInputString(htPage,'ind1)
-  from1 := htpLabelInputString(htPage,'from1)
-  to1 := htpLabelInputString(htPage,'to1)
-  ind2 := htpLabelInputString(htPage,'ind2)
-  from2 := htpLabelInputString(htPage,'from2)
-  to2 := htpLabelInputString(htPage,'to2)
-  title := htpLabelInputString(htPage,'title)
-  r1 := bcDrawIt2(ind1,from1,to1)
-  r2 := bcDrawIt2(ind2,from2,to2)
-  surfacePart := STRCONC('"surface(",'"{}",fun1,'",{}",fun2,'",{}",fun3,'")")
-  if (title ^= '"") then
-    titlePart := (title = '"" => nil; STRCONC('"{}",'"title ==_"",title,'"_""))
-    bcFinish('"draw",surfacePart,r1,r2,titlePart)
-  else
-    bcFinish('"draw",surfacePart,r1,r2)
-
-bcSeries() ==
-  htInitPage('"Series Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-   (text .  "Create a series by: ")
-   (text . "\beginmenu")
-   (text . "\item ")
-   (bcLinks ("\menuitemstyle{Expansion}" "" bcSeriesExpansion NILl))
-   (text . "\tab{11}Expand a function in a series around a point")
-   (text . "\item ")
-   (bcLinks ("\menuitemstyle{Formula}"  "" bcSeriesByFormula NIL))
-   (text . "\tab{11}Give a formula for the {\em i}'th coefficient")
-   (text . "\endmenu"))
-  htShowPage()
-
-bcSeriesExpansion(a,b) ==
-  htInitPage('"Series Expansion Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain EEM (Expression $EmptyMode))
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em function} you want to expand in a power series")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "log(cot(x))" function EM))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em power series variable}")
-    (text . "\tab{49}")
-    (bcStrings (8 x variable SY))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em point} about which you want to expand")
-    (text . "\tab{49}")
-    (bcStrings (8 "\%pi/2" point EM)))
-  htMakeDoneButton('"Continue",'bcSeriesExpansionGen)
-  htShowPage()
-
-bcSeriesExpansionGen htPage ==
-  fun := htpLabelInputString(htPage,'function)
-  var := htpLabelInputString(htPage,'variable)
-  point := htpLabelInputString(htPage,'point)
-  terms := htpLabelInputString(htPage,'numberOfTerms)
-  bcFinish("series",fun,STRCONC(var,'" = ",point))
-
-bcSeriesByFormula(a,b) ==
-  htInitPage('"Power Series Basic Command",nil)
-  htMakePage '(
-    (text . "Select the kind of power series you want to create:")
-    (text . "\beginmenu")
-    (text . "\item ")
-    (bcLinks ("\menuitemstyle{Taylor Series}" "" bcTaylorSeries taylor))
-    (text . "\newline Series where the exponent ranges over the integers from a {\em non-negative integer} value to plus infinity by an arbitrary {\em positive integer} step size")
-    (text . "\item ")
-    (bcLinks ("\menuitemstyle{Laurent Series}" "" bcLaurentSeries laurent))
-    (text . "\newline Series where the exponent ranges from an arbitrary {\em integer} value to plus infinity by an arbitrary {\em positive integer} step size")
-    (text . "\item ")
-    (bcLinks ("\menuitemstyle{Puiseux Series}" "" bcPuiseuxSeries puiseux))
-    (text . "\newline Series where the exponent ranges from an arbitrary {\em rational value} to plus infinity by an arbitrary {\em positive rational number} step size")
-    (text . "\endmenu"))
-  htShowPage()
-
-bcTaylorSeries(a,b) ==
-  htInitPage('"Taylor Series Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain EEM (Expression $EmptyMode))
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the formula for the general coefficient of the series")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "1/factorial(i)" formula EM))
-    (text . "\blankline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em index variable} for your formula")
-    (text . "\tab{49}")
-    (bcStrings (8 i index SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em power series variable}")
-    (text . "\tab{49}")
-    (bcStrings (8 x variable SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em point} about which you want to expand")
-    (text . "\tab{49}")
-    (bcStrings (8 0 point EM))
-    (text . "\blankline ")
-    (text ."For Taylor Series, the exponent of the power series variable ranges  from an {\em initial value}, an arbitrary non-negative integer, to plus infinity; the {\em step size} is any positive integer.")
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em initial value} of the index (an integer)")
-    (text . "\tab{49}")
-    (bcStrings (8 "0" min I))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em step size} (a positive integer)")
-    (text . "\tab{49}")
-    (bcStrings (8 "1" step PI))
-    (doneButton "Continue" bcTaylorSeriesGen))
-  htShowPage()
-
-bcSeriesByFormulaGen htPage == bcNotReady()
-
-bcLaurentSeries(a,b) ==
-  htInitPage('"Laurent Series Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain EEM (Expression $EmptyMode))
-       (isDomain S (String))
-       (isDomain I (Integer))
-       (isDomain PI (PositiveInteger))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the formula for the general coefficient of the series")
-    (text . "\newline\tab{2} ")
-    (bcStrings (55 "(-1)**(n - 1)/(n + 2)" formula EM))
-    (text . "\vspace{1}\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em index variable} for your formula")
-    (text . "\tab{49}")
-    (bcStrings (8 n index SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em power series variable}")
-    (text . "\tab{49}")
-    (bcStrings (8 x variable SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em point} about which you want to expand")
-    (text . "\tab{49}")
-    (bcStrings (8 0 point F))
-    (text . "\blankline")
-    (text . "\newline For Laurent Series, the exponent of the power series variable ranges from an {\em initial value}, an arbitrary integer value, to plus infinity; the {\em step size} is any positive integer.")
-    (text . "\blankline")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em initial value} of the index (an integer)")
-    (text . "\tab{49}")
-    (bcStrings (8 "-1" min I))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em step size} (a positive integer)")
-    (text . "\tab{49}")
-    (bcStrings (8 "1" step PI))
-    (doneButton "Continue" bcLaurentSeriesGen))
-  htShowPage()
-
-bcPuiseuxSeries(a,b) ==
-  htInitPage('"Puiseux Series Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain EEM (Expression $EmptyMode))
-       (isDomain S (String))
-       (isDomain I (Integer))
-       (isDomain PI (PositiveInteger))
-       (isDOmain RN (Fraction (Integer)))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text ."Enter the {\em formula} for the general coefficient of the series")
-    (text . "\newline\tab{2} ")
-    (bcStrings(55 "(-1)**((3*n - 4)/6)/factorial(n - 1/3)" formula EM))
-    (text . "\vspace{1}\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em index variable} for your formula")
-    (text . "\tab{49}")
-    (bcStrings (8 n index SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em power series variable}")
-    (text . "\tab{49}")
-    (bcStrings (8 x variable SY))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em point} about which you want to expand")
-    (text . "\tab{49}")
-    (bcStrings (8 0 point F))
-    (text . "\blankline ")
-    (text . "For Puiseux Series, the exponent of the power series variable ranges from an {\em initial value}, an arbitary rational number, to plus infinity; the {\em step size} is an any positive rational number.")
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em initial value} of index (a rational number)")
-    (text . "\tab{51}")
-    (bcStrings (6 "4/3" min RN))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em step size} (a positive rational number)")
-    (text . "\tab{51}")
-    (bcStrings (6 "2" step RN))
-    (doneButton "Continue" bcPuiseuxSeriesGen))
-  htShowPage()
-
-bcTaylorSeriesGen htPage == bcSeriesGen(htPage)
-
-bcLaurentSeriesGen htPage ==
-  bcSeriesGen(htPage)
-
-bcPuiseuxSeriesGen htPage ==
-  bcSeriesGen(htPage)
-
-bcSeriesGen(htPage) ==
-  step:= htpLabelInputString(htPage,'step)
-  min := htpLabelInputString(htPage,'min)
-  formula := htpLabelInputString(htPage,'formula)
-  index   := htpLabelInputString(htPage,'index)
-  var := htpLabelInputString(htPage,'variable)
-  point := htpLabelInputString(htPage,'point)
-  varPart := STRCONC(var,'" = ",point)
-  minPart := STRCONC(min,'"..")
-  bcFinish('"series",STRCONC(index,'" +-> ",formula),varPart,minPart,step)
-
-bcLimit() ==
-  htInitPage('"Limit Basic Command",nil)
-  htMakePage '(
-   (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain SY (Symbol)))
-   (text . "What kind of limit do you want to compute? ")
-   (text . "\blankline ")
-   (text . "\beginmenu")
-   (text . "\item ")
-   (bcLinks ("\menuitemstyle{A real limit?}" "" bcRealLimit real))
-   (text . "\indentrel{17}\tab{0}")
-   (text . "The limit as the variable approaches a {\em real} value along the real axis")
-   (text . "\indentrel{-17}")
-   (text . "\item ")
-   (text . "\blankline ")
-   (bcLinks ("\menuitemstyle{A complex limit?}" "" bcComplexLimit complex))
-   (text . "\indentrel{17}\tab{0}")
-   (text . "The limit as the variable approaches a {\em complex} value along any path in the complex plane")
-   (text . "\indentrel{-17}")
-   (text . "\endmenu")
-    )
-  htShowPage()
-
-bcRealLimit(a,b) ==
-  htInitPage('"Real Limit Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-       (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em function} you want to compute the limit of:")
-    (text . "\newline\tab{2} ")
-    (bcStrings (45 "x*sin(1/x)" expression EM))
-    (text . "\blankline")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the name of the {\em variable}: ")
-    (text . "\tab{41}")
-    (bcStrings (6 x variable SY))
-    (text . "\blankline")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Compute the limit at")
-    (radioButtons location
-      ("A finite point:" (
-        (text . "\tab{33}")
-        (bcStrings (6 0 point F))) finitePoint)
-      ("Plus infinity" "" plusInfinity)
-      ("Minus infinity" "" minusInfinity))
-    (doneButton "Continue" bcRealLimitGen))
-  htShowPage()
-
-bcRealLimitGen htPage ==
-  (p := htpButtonValue(htPage,'location)) ^= 'finitePoint =>
-    fun := htpLabelInputString(htPage,'expression)
-    var := htpLabelInputString(htPage,'variable)
-    loc :=
-      p = 'plusInfinity => '"%plusInfinity"
-      '"%minusInfinity"
-    bcFinish('"limit",fun,STRCONC(var,'" = ",loc))
-  page := htInitPage('"Real Limit Basic Command",nil)
-  htMakePage '(
-    (text . "Compute the limit")
-    (lispLinks
-       ("\menuitemstyle{From both directions}" "" bcRealLimitGen1 both)
-       ("\menuitemstyle{From the right}" "" bcRealLimitGen1 right)
-       ("\menuitemstyle{From the left}" "" bcRealLimitGen1 left)))
-  htpSetProperty(page,'fun,htpLabelInputString(htPage,'expression))
-  htpSetProperty(page,'var,htpLabelInputString(htPage,'variable))
-  htpSetProperty(page,'loc,htpLabelInputString(htPage,'point))
-  htShowPage()
-
-bcRealLimitGen1(htPage,key) ==
-  direction :=
-    key = 'right => '"_"right_""
-    key = 'left => '"_"left_""
-    nil
-  fun := htpProperty(htPage,'fun)
-  var := htpProperty(htPage,'var)
-  loc := htpProperty(htPage,'loc)
-  varPart := STRCONC(var,'" = ",loc)
-  bcFinish('"limit",fun,varPart,direction)
-
-bcComplexLimit(a,b) ==
-  htInitPage('"Complex Limit Basic Command",nil)
-  htMakePage '(
-    (domainConditions
-        (isDomain EM $EmptyMode)
-       (isDomain S (String))
-       (isDomain F (Float))
-       (isDomain SY (Symbol)))
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the {\em function} you want to compute the limit of:")
-    (text . "\newline\tab{2} ")
-    (bcStrings (40 "sin(a*x)/tan(b*x)" expression EM))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Enter the name of the {\em variable}: ")
-    (text . "\tab{37}")
-    (bcStrings (5 x variable SY))
-    (text . "\blankline ")
-    (text . "\newline ")
-    (text . "\menuitemstyle{}\tab{2}")
-    (text . "Compute the limit at")
-    (radioButtons location
-      ("A finite point:" (
-       (text . "\newline\space{0}Real part:\space{3}")
-       (bcStrings (20 0 real F))
-       (text . "\newline Complex part:")
-       (bcStrings (20 0 complex F))) finitePoint)
-      ("Complex infinity" "" complexInfinity))
-     (doneButton "Continue" bcComplexLimitGen))
-  htShowPage()
-
-bcComplexLimitGen htPage ==
-  fun := htpLabelInputString(htPage,'expression)
-  var := htpLabelInputString(htPage,'variable)
-  loc :=
-    (p := htpButtonValue(htPage,'location)) = 'finitePoint =>
-      real := htpLabelInputString(htPage,'real)
-      comp := htpLabelInputString(htPage,'complex)
-      complexPart :=
-        comp = '"0" => '""
-        comp = '"1" => '"%i"
-        STRCONC(comp,'"*%i")
-      real = '"0" =>
-        complexPart = '"" => "0"
-        complexPart
-      complexPart = '"" => real
-      STRCONC(real,'" + ",complexPart)
-    '"%infinity"
-  varPart := STRCONC(var,'" = ",loc)
-  bcFinish('"complexLimit",fun,varPart)
-
-