If you use Python though, you have access to sympy, the symbolic math library. Sympy is under constant development, and it's aiming to be a full-featured computer algebra system (CAS).

So in this article, I take a look at SymPy, the Python module that allows you to do symbolic mathematics, and specifically at a utility named GraviPy that is built upon SymPy. With this utility, you ...

This is in the flavour of MatLab. For those interested in using linear algebra in a symbolic setting, or for working with matrices over the integers or rational numbers (not float point numbers) ...