I am actually quite happy with Sympy, it sometimes needs a helping hand but : - it can solve the equations that I need solved - it is open source and free - it

I am actually quite happy with Sympy, it sometimes needs a helping hand but : - it can solve the equations that I need solved - it is open source and free - it is a python library (I alreaddy know the syntax and it can be plugged in a python codebase) - I can export the results in Latex, C++, Haskell, ... (nice bonus)