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Mathomatic

Mathomatic is a free, portable, general-purpose Computer Algebra System (CAS) that can automatically solve, differentiate, simplify, combine, and compare algebraic equations, perform standard, complex number, modular, and polynomial arithmetic, etc. It does some calculus and is very easy to learn and use. Plotting expressions with gnuplot is also supported (requires gnuplot).

GAP

GAP

GAP is a system for computational discrete algebra, with particular emphasis on Computational Group Theory. GAP provides a pro ...