TeX Quellcode:

\vec{a}-\vec{b}=\vec{a}+\left(-\vec{b}\right)=\begin{pmatrix}a_1\cr a_2\cr a_3\end{pmatrix}+\begin{pmatrix}-b_1\cr-b_2\cr-b_3\end{pmatrix}=\begin{pmatrix}a_1-b_1\cr a_2-b_2\cr a_3-b_3\end{pmatrix}