1. The problem statement, all variables and given/known data I'm working on an infinite series problem and need to find the antiderivative of 1/((x(lnx)^3). 2. Relevant equations u=lnx 3. The attempt at a solution I know I have to use the substitution u=lnx, but I still can't figure out what the answer is. I know the antiderivative of 1/((x(lnx)) is ln(lnx) but the third power in my problem is giving me trouble. Any advice? Thanks!