1. The problem statement, all variables and given/known data [itex]\int[/itex][itex][[/itex]( e^x + 4 )/ (4e^x + 1) [itex]][/itex]^2 2. Relevant equations No substitutions have been given. 3. The attempt at a solution I've tried using the method of f' (x)/f (x). But it was in vain. I haven't been able to do it. I don't really know where to start.