What is the square root of 64 plus the cube root of 27, divided by the fourth root of 625 and multiplied by the fifth root of 32?
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Math question: What is the limit of f(x) as x approaches 3, where f(x) = (x^2 - 9)/(x - 3)?
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Question: What is the general equation for the cosine function f(x) = cos x, and what are its key characteristics in terms of amplitude, period, phase shift, and range?