Evaluate the following integrals by the method of residues: T/2 dx x? dx (b) . + 5x + 6' 8. (a) J. a! > 1, a + sin? x' x? x + 2 x2 dx (c) dx, L. x4 + 10x? + 9 (d) . Jo (x2 + a)3' a real, x sin x COs X (e) J, + a dr, a real, (f) dx, a real, 0 x2 + a? (g) dx, 0 1 + x2 (h) . (1 + x)-1 log x dx,