12[4−3−21]\frac{1}{2}\left[\begin{array}{cc}4 & -3 \\-2 & 1\end{array}\right]21[4−2−31]
−12[4321]-\frac{1}{2}\left[\begin{array}{ll}4 & 3 \\2 & 1\end{array}\right]−21[4231]
[−2321−12]\left[\begin{array}{cc}-2 & \frac{3}{2} \\1 & \frac{-1}{2}\end{array}\right][−21232−1]
[2−3−11]\left[\begin{array}{cc}2 & -3 \\-1 & 1\end{array}\right][2−1−31]