Applicare la formula: $\int\frac{n}{ax+b}dx$$=\frac{n}{a}\ln\left(ax+b\right)+C$, dove $a=-1$, $b=1$, $x=t$ e $n=1$

Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=1$, $b=-1$ e $a/b=\frac{1}{-1}$

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