CUTE works with all modern browsers without the need of additional plugins.

Example

syms a b c d e f g h i;
cute ({inv([a, b, c; d, e, f; g, h, i]); ...
sqrt(sinh(a)/acosh(b) - ...
42*log(c)) + ...
exp(d) + ...
e^(1/f)^g^(1/h)-1/(1+1/(1+1/(1+1/i)))})

is a torture test and displays a column vector.
Its first element is 3x3 inverse matrix and
the second element is a long non-sense expression
involving common functions.