help on A and B

A. J x (3x2 - 7)5 dx [note: use the u-substitution - show all the steps] [5 points] B. Given f(x) = x2 and g(x) = 2x. [10 points] a. Find the points of intersection. b. Find the area between these two functions using the points of intersection. c. Sketch the graph and shade the portion of graph that represents the area