TeX Quellcode:
\begin{array}{rcl}\alpha + \beta &=& \dfrac{3\pi}{8}+45^\circ \\\alpha + \beta &=& 67{,}5^\circ +45^\circ \\\alpha + \beta &=& 112{,}5^\circ \\\alpha + \beta & < & 180^\circ \\\end{array}