Math question: In triangle ABC, angle A = 50 degrees and angle B = 70 degrees. Find the measure of angle C.
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Math question: What is the derivative of the function f(x) = cos(x) - 2x^3 + ln(x) within its domain?
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What is the resultant displacement when adding a vector of magnitude 30 units in the east direction to another vector of magnitude 50 units in the south direction?