Free computer algebra system.The CAS will be very familiar to users of HP and Texas Instruments calculators.Compatibility mode for calculators (TI89, Voyage 200, TI Nspire CAS).Functions:Calculus (derivation, integration, limit, series expansion).Simplification, equation solver, partial fraction decomposition. linear algebra (vectors, matrices, row reduction to echelon form, eigenvalues and eigenvectors).Arbitrary precision integer and floats, integer and polynomial arithmetic (gcd, extended gcd, factorisation, ...)