Maxima, a full featured computer algebra system, now runs on your Android mobile
devices. Maxima, and its predecessor Macsyma is one of the most long-established
software in the world, back in 1960s at MIT LCS and Project Mac. You can perform
many many math operations such as integration, differentiation, matrix
operations, rational numbers, symbolic treatment of constants such as pi, e,
euler's gamma, symbolic and numerical treatment of special functions such as
sin(x), cos(x), log(x), exp(x),