I would like to know how can I exchange mathematical ideas with symbolic representations by computer, by e-mail or asking questions with formulas and mathematics symbols in the internet. For letters we have the keyboard but mathematics it is different due to the complexity. I have heard about Latex but I am not sure if it is the best solution for what I want... I also don`t understand very well what are macros and the difference between Tex e Latex.
5) Funny notes in A Guide to Writing Mathematics.
6) Reference Book: How to Write Mathematics