[2−516−37]\left[\begin{array}{rr}2 & -5 \\1 & 6 \\-3 & 7\end{array}\right]21−3−567
[−31276−5]\left[\begin{array}{rrr}-3 & 1 & 2 \\7 & 6 & -5\end{array}\right][−37162−5]
[−37162−5]\left[\begin{array}{rr}-3 & 7 \\1 & 6 \\2 & -5\end{array}\right]−31276−5
[76−5−312]\left[\begin{array}{rrr}7 & 6 & -5 \\-3 & 1 & 2\end{array}\right][7−361−52]
