TeX Quellcode:
\begin {array}{rcl} 3 \cdot (2 \cdot \left(-2\right)-1) &=& -5\cdot (17+7 \cdot \left(-2\right)) \cr 3 \cdot (-4-1) &=& -5 \cdot (17-14) \cr 3 \cdot (-5) &=& -5 \cdot 3 \cr -15 &=& -15 \end{array}