lol, seriously Calc is NOT that hard that you need to do this.
I got an A in Calculus II after doing most of my homework with Mathematica, and just brushing up before the exams. To be fair, this was largely because the people who were in the fall Calculus II seemed to largely be people who had to retake it, so the curve was ridiculously forgiving compared to Calc I (which I had taken during the regular fall semester as well).
It was pretty funny, one day our regular TA was sick so we had another TA come in (who happened to be my friend), but the substitute TA actually tried to teach us and make us take a serious quiz. Pretty funny because everybody bombed it, so our regular TA just tore them up
OK, so normally speaking Calc II wouldn't be such a joke, but I got an A- in Calculus I (where I mostly did the homework without Mathematica), and I don't remember having to work too insanely hard either.
Just don't rely too much on using Mathematica, and you should be fine so long as you keep up on the homework in your class.
I mean, basically once you remember how to do a type of question you'll be set. Derivatives, Limits, whatever.
Or maybe my memory is just terrible and I've forgotten the hours I put in, lol.
(Mathematica is really powerful math software for those who haven't used it before, so it'll basically do any derivative or limit for you, etc)