1. The problem statement, all variables and given/known data a) S 13(4^x + 3^x)dx b) S (cosx + sec^2x)dx c) S (3-(1/x))dx d) S e^(7x)dx 2. Relevant equations The S is supposed to be the integration sign 3. The attempt at a solution Are these correct or at least close? a) = 13((4^x)/(ln(4) + (3^x)/(ln(3))) + C b) = (sinx + tanx) + C c) = -ln + C d) Do I use U-substitution for this one?