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$\begin{bmatrix}1 & -7&10\\4 & -5&-7\end{bmatrix}$
$\begin{bmatrix}3 & -7&10\\4 & -5&-7\end{bmatrix}$
$\begin{bmatrix}1 & 3&-2\\-4 & -1&-1\end{bmatrix}$
