Applicare la formula: $\int\frac{a}{bc}dx$$=\frac{1}{c}\int\frac{a}{b}dx$, dove $a=1$, $b=x^2+1$ e $c=2$

Applicare la formula: $\int\frac{n}{x^2+b}dx$$=\frac{n}{\sqrt{b}}\arctan\left(\frac{x}{\sqrt{b}}\right)+C$, dove $b=1$ e $n=1$

Applicare la formula: $\left[x\right]_{a}^{b}$$=eval\left(x,b\right)-eval\left(x,a\right)+C$, dove $a=0$, $b=1$ e $x=\frac{1}{2}\arctan\left(x\right)$