Question: What is the maximum value of the function f(x) = 2x^3 - 5x^2 + 3x - 1 on the interval [-1, 2]?
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What is the ratio between the circumference of a circle to its diameter?
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Math question: Given triangle ABC, angle bisector BD intersects side AC at point D. If angle B is 50 degrees and angle C is 80 degrees, find the measure of angle A. (