TeX Quellcode:

\begin{matrix}2\vec{a} - 3\vec{b} - 7\vec{c} &=& 2\begin{pmatrix}27\cr-41\end{pmatrix} &-& 3\begin{pmatrix}-25\cr-33\end{pmatrix} &-& 7\left(-\begin{pmatrix}-19\cr31\end{pmatrix}\right) \cr \cr &=& \begin{pmatrix}2\cdot 27\cr2\cdot \left(-41\right)\end{pmatrix} &+& \begin{pmatrix}-3\cdot \left(-25\right)\cr-3\cdot \left(-33\right)\end{pmatrix} &+& \begin{pmatrix}-7\cdot 19\cr-7\cdot \left(-31\right)\end{pmatrix} \cr \cr &=& \begin{pmatrix}54\cr-82\end{pmatrix} &+& \begin{pmatrix}75\cr99\end{pmatrix} &+& \begin{pmatrix}-133\cr217\end{pmatrix} \cr \cr &=& \begin{pmatrix}-4\cr234\end{pmatrix} \end{matrix}