What is the result of multiplying vector A (3, 2, 5) by vector B (1, -4, 6)?
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Question: In triangle ABC, angle A measures 45 degrees. If the angle bisector of angle A splits BC into segments of length 6 and 9, what is the length of BC?
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Question: What is the derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 2?