Evaluate ∫1x2+4x+13dx\int \frac{1}{x^2 + 4x + 13} dx∫x2+4x+131dx.
13arctan(x+23)+C\frac{1}{3} \arctan(\frac{x+2}{3}) + C31arctan(3x+2)+C
arctan(x+23)+C\arctan(\frac{x+2}{3}) + Carctan(3x+2)+C
13ln∣x2+4x+13∣+C\frac{1}{3} \ln|x^2+4x+13| + C31ln∣x2+4x+13∣+C
19arctan(x+23)+C\frac{1}{9} \arctan(\frac{x+2}{3}) + C91arctan(3x+2)+C