piles of unread links from Evernote #2

This time, links for Pre-Calculus and Calculus. I wanted to keep it simple, as follows:

Tips on doing well in Calculus [1] [2] [3] [4] [5] [6] [7]

Pre-calculus online tutorials and notes [1] [2] [3] [4] [5] [6]

To factorize quickly [1] [2] [3] [4] [5] [6] [7]

Khan Academy [1] [2]

Calculus: Piecewise function [1] [2] [3] [4]

Why did I use numbering like that? Because most of the articles linked above have the same name. So, why bother to name ’em all?˜

Special Section: Win7 tips from SevenForums

done!