Applicare la formula: $\frac{a}{\frac{b}{c}}$$=\frac{ac}{b}$, dove $a=1$, $b=3\left(2y^2+1\right)$, $c=y$, $a/b/c=\frac{1}{\frac{3\left(2y^2+1\right)}{y}}$ e $b/c=\frac{3\left(2y^2+1\right)}{y}$

Applicare la formula: $b\cdot dy=a\cdot dx$$\to \int bdy=\int adx$, dove $a=\frac{1}{x-1}$, $b=\frac{y}{3\left(2y^2+1\right)}$, $dyb=dxa=\frac{y}{3\left(2y^2+1\right)}dy=\frac{1}{x-1}dx$, $dyb=\frac{y}{3\left(2y^2+1\right)}dy$ e $dxa=\frac{1}{x-1}dx$