[11−11]\left[\begin{array}{rr}1 & 1 \\-1 & 1\end{array}\right][1−111]
[2637]\left[\begin{array}{ll}2 & 6 \\3 & 7\end{array}\right][2367]
[1−339]\left[\begin{array}{cc}1 & -3 \\3 & 9\end{array}\right][13−39]
[1339]\left[\begin{array}{ll}1 & 3 \\3 & 9\end{array}\right][1339]
