After getting started with Sage, I have experienced lots of anger and stress. Because I'm not aware of the codes and errors. Especially I don't understand the error code. It is quite different form GCC or something. Even I read the error report, I can't figure out exactly what the problem is. So I'm thinking of moving to mathematica or something. But I wonder if it worth is to learn the sage more. Even I hate the maxima in integrations. Could you please tell me what benefit the sage has? Or if I should use ROOT, then would it be better just move to the ROOT? In principle, the ROOT is data analysis package. But people say that they can replace mathematica as the SW. If it is possible. I would move.