None of the above 36. 73 Sa+ dx (1 + x4)2 74 a. +C 4(x+x5)2 1 b. + c 4(1+x) c. (1 + x4)-1 +C 5 d. + C 4(x+x5) e. None of the above 4.5 Integration by Substitution For #32-36, find the indefinite integral and check the result by differentiation.