Evaluate ∫dxx2+6x+13\int \frac{dx}{x^2+6x+13}∫x2+6x+13dx.
12arctan(x+32)+C\frac{1}{2} \arctan(\frac{x+3}{2}) + C21arctan(2x+3)+C
13arctan(x+33)+C\frac{1}{3} \arctan(\frac{x+3}{3}) + C31arctan(3x+3)+C
arctan(x+3)+C\arctan(x+3) + Carctan(x+3)+C
14arctan(x+32)+C\frac{1}{4} \arctan(\frac{x+3}{2}) + C41arctan(2x+3)+C