Applicare la formula: $\int\ln\left(x+b\right)dx$$=\left(x+b\right)\ln\left(x+b\right)-\left(x+b\right)+C$, dove $b=1$, $dx=dt$, $x=t^2$ e $x+b=t^2+1$

Applicare la formula: $-\left(a+b\right)$$=-a-b$, dove $a=t^2$, $b=1$, $-1.0=-1$ e $a+b=t^2+1$

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