Math question: Can the equation x^n + y^n = z^n, where x, y, z, and n are positive integers, have any solutions for n>2, as proven by Fermatβs Theorem?
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What is the derivative of f(x) = 3x^4 - 5x^2 + 2x - 7?
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Math question: Find the value of x if f(x) = 2x^2 - 5, and f(x) = 15.