Computer algebra system -- extra code

 Maxima is a fully symbolic computation program. It is full featured
 doing symbolic manipulation of polynomials, matrices, rational
 functions, integration, Todd-coxeter methods for finite group
 analysis, graphing, multiple precision floating point computation.
 It has a symbolic source level debugger for maxima code. Maxima is
 based on the original Macsyma developed at MIT in the 1970s. It is
 quite reliable, and has good garbage collection, and no memory leaks.
 It comes with hundreds of self tests.
 .
 This package contains a set of contributed routines and add-on
 packages.