I need solve this questions of calculus II

Question [ Show all your work. a) [' Evaluate 6 ( x+ 2) (x -2dx b ) ! If f(x)dx = 6In(1x]) - =cos(5x) - 3e3 + =x 1 2 + 6x + C U then find f(x). c) : Estimate the area under the graph of f(x) = x2+1 from x = 0 to x = 2 using four approximationectangles and midpoints