Help to get started with the code of Maxima

   >From mailnull  Tue Jun 25 01:09:11 2013

   Thanks for the explanations,

   So I guess (meval '(($DIFF SIMP) ((%SIN SIMP) $X) $X) ) should enable me to
   access to the symbolic maths functions from Common Lisp? Unfortunately
   meval is not recognized, even after I compile and load maxima into my SBCL
   repl. Am I missing something?

Probably you are missing
(in-package :maxima)

When you are in the maxima package, it works:

MAXIMA> (meval '(($DIFF SIMP) ((%SIN SIMP) $X) $X))
((%COS SIMP) $X)

Note that there is a reader macro that lets you use the Maxima parser from CL:

MAXIMA> #$ diff(sin(x),x); #$
((%COS SIMP) $X)

You may find previous discussions on using slime and Maxima useful:
http://www.math.utexas.edu/pipermail/maxima/2011/026609.html

Leo