This sort of thing is called a Computer Algebra System (CAS) and there are good free ones. https://www.sagemath.org/ https://www.sagemath.org/ http://maxima.s

This sort of thing is called a Computer Algebra System (CAS) and there are good free ones. https://www.sagemath.org/ https://www.sagemath.org/ http://maxima.sourceforge.net/ http://maxima.sourceforge.net/ https://www.sympy.org/en/index.html https://www.sympy.org/en/index.html