5t² - 7t r(t) (31 + 1)' r'(t) = (31 + 1)³ (10t — 7) − (5t² − 7t)(3)(3t + 1)²(3) - - - [(31 + 1)3]2 (31 + 1)³ (101 − 7) − 9(5t² - 7t)(3t + 1) - (31 + 1)6 (31 + 1)(10t − 7) − 9(5t² – 71) - - (31 + 1)4 - 30t² – 11t – 7 – 45t² + 63t -15t² (31 + 1)4 521-7 (31 + 1)4

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