What is the sum of the mixed numbers 3 1/2 and 2 3/4? Factoring numbers, find all the prime factors of 56 and 84. What is the product of 56 and 84? Lastly, find the square root of 256.
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What is the standard deviation of the set {8, 4, 6, 10, 12}?
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Find the derivative of f(x) = cos^2(x) - sin^2(x) + tan(x) at x = π/4.