1. The problem statement, all variables and given/known data d/dx x∫π sin(t2) 2. Relevant equations 3. The attempt at a solution Generally, I take the integral and then plug in the upper value and then the lower value, and then subtract them, correct? I tried to get help online, but that's a weird result: http://www.wolframalpha.com/input/?i=ntegral+of+sin%28x^2%29 And with π, it's xsin(π). I don't know how to get the solution here.