[2−3−48]\left[\begin{array}{rr}2 & -3 \\-4 & 8\end{array}\right][2−4−38]
[2−4−38]\left[\begin{array}{cr}2 & -4 \\-3 & 8\end{array}\right][2−3−48]
[2348]\left[\begin{array}{ll}2 & 3 \\4 & 8\end{array}\right][2438]
[2438]\left[\begin{array}{ll}2 & 4 \\3 & 8\end{array}\right][2348]