TeX Quellcode:

\begin{array}{rcl}-\sqrt{\dfrac{3}{2}\cdot 0+81}+7 &=& -2-\sqrt{2\cdot 0} \cr -\sqrt{81}+7 &=& -2-\sqrt{0} \cr -9+7 &=& -2 \cr -2 &=& -2\end{array}