What is the derivative of f(x) = sin(2x) + cos(3x) for all x in R?
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What is the standard form equation of an ellipse with vertical major axis having center at (4, -3), a minor axis length of 6 units, and a major axis length of 10 units?
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Find the value of x in the equation 3(x + 4) = 2x - 5.