Circle: What is the circumference of a circle with a radius of 5 units?
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Math question: What theorem states that if a function is continuous on a closed interval [a, b] and F(x) is an antiderivative of f(x) on [a, b], then ∫[a, b] f(x) dx = F(b) - F(a)?
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Find the derivative of f(x) = 7x^3 - 5x^2 + 2x - 1.