Find the indefinite Integral of the following: 7 . 2x- +7x -3 x -2 8. [sec ~ dx 2 9. Solve the following differential equation 2x dx x' +9 10. Evaluate the following: 1 -12x+3 11. Find the area of the region bounded by the following functions: x = 1; x =5; y =0; and y = = x+6 X 12. Find the average value of f (x) = _ 4(x+1 ) x 2 over the interval [2, 4]