TeX Quellcode:

\vec{a}+\vec{b}=\begin{pmatrix}4\cr-8\end{pmatrix}+\begin{pmatrix}2\cr3\end{pmatrix}=\begin{pmatrix}4+2\cr-8+3\end{pmatrix}=\begin{pmatrix}6\cr-5\end{pmatrix}