[2.5]\left[\begin{array}{c}2 \\ .5\end{array}\right][2.5]
[16−2.53]\left[\begin{array}{cc}16 & -2 \\.5 & 3\end{array}\right][16.5−23]
[.5−2]\left[\begin{array}{ll}.5 & -2]\end{array}\right.[.5−2]
[−1623.5]\left[\begin{array}{cc}-16 & 2 \\3 & .5\end{array}\right][−1632.5]