1. The problem statement, all variables and given/known data [itex]∫sec(x)tan(x)+x/(x^2+1) dx[/itex] 3. The attempt at a solution I replaced sec and tan by [itex]1/cos(x)[/itex] and [itex]sin/cos(x)[/itex] then end up with [itex]sin(x)/cos^2(x)[/itex] then I replace [itex]cos^2 x [/itex] by [itex]1-sin^2 x [/itex] then I dont know where to go. the second part of the equation works with u substitution. I just cant see where the identities of the first part are leading me. any hint? thanks in advance!