Evaluate ∫01dxx2+2x+2\int_0^1 \frac{dx}{x^2+2x+2}∫01x2+2x+2dx.
arctan2−arctan1\arctan 2 - \arctan 1arctan2−arctan1
π4\frac{\pi}{4}4π
arctan2−π/4\arctan 2 - \pi/4arctan2−π/4
ln2\ln 2ln2