Evaluate ∫x(x2+1)2 dx\int \frac{x}{(x^2+1)^2}\,dx∫(x2+1)2xdx.
−12(x2+1)+C-\frac{1}{2(x^2+1)} + C−2(x2+1)1+C
12(x2+1)+C\frac{1}{2(x^2+1)} + C2(x2+1)1+C
−1(x2+1)2+C-\frac{1}{(x^2+1)^2} + C−(x2+1)21+C
ln(x2+1)+C\ln(x^2+1) + Cln(x2+1)+C