Calculate ∫01x3x2+1dx\int_0^1 \frac{x^3}{x^2+1} dx∫01x2+1x3dx.
12−12ln2\frac{1}{2} - \frac{1}{2}\ln 221−21ln2
12+12ln2\frac{1}{2} + \frac{1}{2}\ln 221+21ln2
ln2−1/2\ln 2 - 1/2ln2−1/2
1−ln21 - \ln 21−ln2