TeX Quellcode:

\begin{array}{rcl}-\left(4\cdot (-4)-9\right)-2\left(-\dfrac{-4}{2}+1\right)+7 &=& -11\cdot (-4)-6+3\cdot (-4) \cr -\left(-16-9\right)-2\left(-(-2)+1\right)+7 &=& 44-6+(-12) \cr -(-25)-2\cdot 3+7 &=& 44-6-12 \cr 25-6+7 &=& 26 \cr 26 &=& 26 \end{array}