Zdroj TeX:

\small \left(\begin{array}{ccc} 1&0&0 \\ 0&1&0 \\ 0&0&1\end{array}\right) \cdot \left(\begin{array}{ccc} 5 \\ -1 \\ 9 \end{array}\right) = \left(\begin{array}{ccc} 1&2&1 \\ 1&3&2 \\ 2&4&3\end{array}\right) \cdot \left(\begin{array}{ccc} r \\ s \\ t \end{array}\right)