Which mathematical software(s) can you recommend for 1. As a substitute for a calculator (TI89): making basic graphs, regressions (linear, exponential), vectors, solving equations, showing graphs in 2d and 3d? 2. Writing an ebook with lot's of math. I'm thinking Mathml or Mathtype might be easier to learn than latex for writing an ebook, For doing calculations in basic physics (classical mechanics) and calculus, I've heard maple is good, but is there an easier alternative? I'd imagine it has a bit of a learning curve.