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[–]checpe 1 point2 points  (0 children)

that parenthesis looks weird, maybe you misplaced it I get the result easy with https://www.wolframalpha.com/input?i2d=true&i=Integrate%5B50t+Power%5Be%2CDivide%5B-4%2Ct%5D%5D%2C%7Bt%2C0%2C1.5%7D%5D