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Evaluate the integral using the formula with the given choice of u and dv. integral x sin x dx: u = x, dv = sin dx integral xe^2x dx: u = x, dv = e^2x dx integral (2x + 9)e^x dx: u = 2x + 9, dv = e^x integral x cos 4x dx: u = x, dv = cos 4x dx integral x^3 ln x dx: u = ln x, dv = x^3 dx integral tan^-1 x dx: u = tan^-1 x, dv = dx In Exercise 7-34, evaluate using Integration integral (4x - 3)e^-x dx