Please help with Q20 with full explanation thanks.

1:59 learn-ap-southeast-1-prod-fleet02-xy C 19. (16 points) Find dy if dx (a) y = tan(2x) 3x + 1 ' (b) y = arcsin(x2 + 1). (c) y = ev2+cosa (d) y = (sin x) . 20. (30 points) Evaluate the following integrals. (a) x(x2 + 1 ) - dx . ( b ) 1 + sin x + cos x dx. (c) sin(6:) cos (4x) da. (d) (x2 + x)edx. 1 dx . 72 + 4 21. (10 points) Let 3x + 7 if x