(166−25)\left(\begin{array}{rr}16 & 6 \\-2 & 5\end{array}\right)(16−265)
(16−6−25)\left(\begin{array}{cc}16 & -6 \\-2 & 5\end{array}\right)(16−2−65)
(−165−2−5)\left(\begin{array}{cc}-16 & 5 \\-2 & -5\end{array}\right)(−16−25−5)
(16−6−2−5)\left(\begin{array}{cc}16 & -6 \\-2 & -5\end{array}\right)(16−2−6−5)