1. The problem statement, all variables and given/known data Expand f(x)= (x+x2)/(1-x)3 2. Relevant equations ??? 3. The attempt at a solution I've tried everything I can think of to simplify this equation: substitution of various other power series, partial fraction decomposition, taking derivatives, multiplying out the denominator. It's driving me nuts. Thanks for any steps in a new direction.