TeX Quellcode:
\begin{array}{rcl} \dfrac{4}{5}t-\dfrac{t}{10}+\dfrac{7}{15}t &=& \dfrac{24}{30}t-\dfrac{3}{30}t+\dfrac{14}{30}t \cr \cr &=& \dfrac{24-3+14}{30}t \cr \cr &=& \dfrac{35}{30}t \cr \cr &=& \dfrac{7}{6}t \end{array}