Math question: "Find the extrema of the function f(x) = x^2 + 3x - 5 over the interval [-2, 4]."
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Simplify cosh(x) - sinh(x) for x = π/4.
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Math Question: Convert the mixed number 3 1/4 to an improper fraction. Then, find the prime factors of the resulting numerator, and simplify the fraction completely. (