Math question: Find the derivative of f(x) = 3sin(2x) + 5cos(3x) with respect to x.
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Math question: Find the smallest natural number n such that the equation x^n + y^n = z^n has no positive integer solutions, satisfying Fermatβs Theorem.
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What is the formula for the area of a regular polygon with side length 's' and 'n' number of sides?