5-46 23. [ ex ( 4 - e ) do 25. [(x+ + 3x3 + 1) dx 27 . [ (2 + 21 + 37 ) dt 29. ( It * + !)ax 31. 33. ( 2x - 4) 4 dx 35. 37 . [( + x ) Vx* + 2x2 + 1 dx In Exercises 15 through 44, evaluate the given definite e+1 X integral using the fundamental theorem of calculus. 39. 2 x - dx 15 . 5 dx e (In x)2 41. -dx X 17. [ (3x + 2) dx [1/2 21/x 43. 1/3 - dx 19. 3t dt