TeX Quellcode:
\begin{array}{rcl} \genfrac{}{}{1pt}{0}{-\frac{8y^{13}}{7x}}{\frac{24y^2 z}{49rt^{11}}} &=& -\dfrac{8y^{13}}{7x} : \dfrac{24y^2 z}{49rt^{11}} \\\\ &=& -\dfrac{8y^{13}}{7x} \cdot \dfrac{49rt^{11}}{24y^2 z} \\\\&=& -\dfrac{y^{11}}{x} \cdot \dfrac{7rt^{11}}{3z} \\\\&=& -\dfrac{7rt^{11}y^{11}}{3xz} \end{array}