I see your point here. I do feel that it is convenient (easy) to use SymPy. However, I think I'm trying to say that (1) since the algebra is hard, (2) we prefer to have sympy do the algebra. This doesn't depend really on SymPy being convenient/easy to use (though I do think it is easy to use!). So I changed tempting to desirable. Let me know your thoughts. I'm happy to change it to 'convenient' if you feel it's more appropriate.