[57]\left[\begin{array}{l}5 \\7\end{array}\right][57]
[4502−69]\left[\begin{array}{rr}4 & 5 \\0 & 2 \\-6 & 9\end{array}\right]40−6529
[427093]\left[\begin{array}{lll}4 & 2 & 7 \\0 & 9 & 3\end{array}\right][402973]
[−2501]\left[\begin{array}{rr}-2 & 5 \\0 & 1\end{array}\right][−2051]