TeX джерело:

{\;\; \left|\begin{array}{ccc}a_{11}& a_{12}& a_{13}\\ a_{21}&a_{22}&a_{23}\\ a_{31}&a_{32}&a_{33} \end{array}\right|=\;\left|\begin{array}{ccc} a_{11}& a_{12}& a_{13}+k\cdot a_{11}\\ a_{21}&a_{22}&a_{23}+k\cdot a_{21}\\ a_{31}&a_{32}&a_{33}+k\cdot a_{31} \end{array}\right|}