im pretty bad with my algebra due to the fact i never payed attention in highschool and now calculus is kicking my butt in college not because its complicated to understand...just that i cannot apply my algebriac knowledge.....i was wondering if anyone happened to know of a site or could write a little tutorial on simplifying complicated fractions....for example

fractions divided by fractions
fractions with squareroots divided by fractions with squareroots