TeX Quellcode:

\begin{array}{rcl}\alpha + \beta + \gamma &=& \dfrac{5\pi}{6}+30^\circ +60^\circ \\\alpha + \beta + \gamma &=& 150^\circ +30^\circ +60^\circ \\\alpha + \beta + \gamma &=& 240^\circ \\\alpha + \beta + \gamma & < & 360^\circ \\\end{array}