1. The problem statement, all variables and given/known data I need to intergrate sin(x^3) for a sum and I don't know how to. 2. Relevant equations The sum is (integrate)3x+Sin(x^3)+1 3. The attempt at a solution I've tried substituting u for x^3 but I don't know where to go from there considering du=3x^2.dx, which isn't relevant to my equation in any way.