[3542]\left[\begin{array}{ll}3 & 5 \\4 & 2\end{array}\right][3452]
[−1616]\left[\begin{array}{rr}-1 & 6 \\1 & 6\end{array}\right][−1166]
[8−418−9]\left[\begin{array}{rr}8 & -4 \\18 & -9\end{array}\right][818−4−9]
[7−61412]\left[\begin{array}{rr}7 & -6 \\14 & 12\end{array}\right][714−612]
