Which of the following is equivalent to ∫1x2+2x+2 dx\int \frac{1}{x^2+2x+2} \,dx∫x2+2x+21dx?
arctan(x+1)+C\arctan(x+1) + Carctan(x+1)+C
ln(x2+2x+2)+C\ln(x^2+2x+2) + Cln(x2+2x+2)+C
12arctan(x+1)+C\frac{1}{2} \arctan(x+1) + C21arctan(x+1)+C
arctan(x)+C\arctan(x) + Carctan(x)+C