composite function composition chain rule 4.4 24. y = -3√/814 - 1 25. y = 3x(2x + 1)³ 26. y = 4x²(3x - 2)5 5t² - 7t 27. r(t) = (3t + 1)³ 13 - 2t 28. s(t) = (4t - 3)4 29. p(t) = t²(t² + 1)5/2 30. g(t) = t³ (t4 + 5) 7/2 31. y = -6e2x 32. y = 8e0.5x -2x3 33. y = e−2x³ 34. y = -40x2 35. y = 5xe²x 36. y = -7x²e-3x 37. y = ln(2 + x²) 38. y = ln(5x + 3) In 3x 39. y x - 3 - logistic function