Math question: In a right triangle, if the length of one side is 30 units and the length of the other side is 40 units, find the length of the hypotenuse.
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What is the derivative of ∫(x^3sin(x^2))dx from 0 to π/2?
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Math question: What is the value of y when x equals 4 in the function y = 2x + 3?