TeX Quellcode:

-\genfrac{}{}{1pt}{0}{-\frac{121}{17}}{\frac{77}{170}} = -\left(-\dfrac{121}{17} : \dfrac{77}{170}\right) = -\left(-\dfrac{121}{17} \cdot \dfrac{170}{77}\right) = -\left(-\dfrac{11}{1} \cdot \dfrac{10}{7}\right) = \dfrac{110}{7}