1. The problem statement, all variables and given/known data <Indefinite integral sign here>[r^2 -2r] / [r^3 - 3r^2 + 1]dr or the second example in the "Substitution" section here: http://people.clarkson.edu/~sfulton/ma132/parfrac.pdf 2. Relevant equations nada. 3. The attempt at a solution Nothing to really attempt, I just don't get what they do with the numerator (i.e., how it turns into a 1).