Math Question: What is the 4th derivative of f(x) = 5x^4 + 3x^3 - 2x^2 + 7x - 1?
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Math question: In triangle XYZ, angle X measures 60 degrees. The angle bisector of angle X intersects side YZ at point P. If the length of YP is 4 units, what is the length of YZ?