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**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.