\(\begin{aligned} \left(x^{2}-\frac{1}{y^{2}}\right):\left(x+\frac{1}{y}\right) & =\left(\frac{x^{2}y^{2}}{y^{2}}-\frac{1}{y^{2}}\right):\left(\frac{xy}{y}+\frac{1}{y}\right)\\ & =\frac{x^{2}y^{2}-1}{y^{2}}:\frac{xy+1}{y}\\ & =\frac{x^{2}y^{2}-1}{y^{2}}\cdot\frac{y}{xy+1}\\ & =\frac{\left(xy-1\right)\left(xy+1\right)}{y^{2}}\cdot\frac{y}{xy+1}\\ & =\frac{\left(xy-1\right)}{y} \end{aligned}\)
Nicht so viele Schritte auf ein mal.