I used Mathematica a lot as an undergrad, but more or less exclusively for doing symbolic math, mostly tricky or tedious integrals. Much later I realized that

I used Mathematica a lot as an undergrad, but more or less exclusively for doing symbolic math, mostly tricky or tedious integrals. Much later I realized that it's actually a more or less full-fledged programming language as well, but, I never got into that.