Description:

Mathomatic™ is a portable, command-line CAS and calculator software, written
entirely in the C programming language. It is free and open source software
(FOSS), published under the GNU Lesser General Public License (LGPL version
2.1), and has been under continual development since 1986. The software can
symbolically solve, simplify, combine, and compare algebraic equations,
simultaneously performing generalized standard, complex number, modular,
and polynomial arithmetic, as needed. It does some calculus and is very easy
to learn and use.

Mathomatic consists of both a text-mode symbolic math application,
and a symbolic math library, each suitable for desktops, laptops, servers,
handhelds, and embedded systems.