Math question: Given triangle ABC, where angle BAC measures 60 degrees, and the angle bisector of angle BAC intersects side BC at point D. If side AB measures 8 units, find the length of BD.
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Question: Find the derivative of f(x) = 3x^2 + ln(x) - 5cos(x)
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What is the limit as x approaches infinity of (3x^4 + 2x^2 - 5) / (4x^4 - 8x + 1)?