Find the derivative of f(x) = 3x^4 − 2x^3 + 5x^2 − 7x + 1 with respect to x.
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What is the square root of 36? How many real solutions does the equation x^2 = 25 have? Give your answer in the form of an inequality. Solve the equation x^2 - 9 = 0 using the square root property.
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What is the period of the trigonometric function f(x) = sin(5x) - cos(3x) - tan(2x) in radians?