(1−234)\left(\begin{array}{cc}1 & -2 \\3 & 4\end{array}\right)(13−24)
(2−312)\left(\begin{array}{cc}2 & -3 \\1 & 2\end{array}\right)(21−32)
(−2321)\left(\begin{array}{cc}-2 & 3 \\2 & 1\end{array}\right)(−2231)
(2346)\left(\begin{array}{ll}2 & 3 \\4 & 6\end{array}\right)(2436)
