[tex]\left(\begin{matrix}0 & -3 & -2 \\-1 & 1 & 0 \\5 & 6 & 7\end{matrix}\right)-\left(\begin{matrix}-2 & 1 & 1 \\4 & 5 & 6 \\3 & 0 & -2\end{matrix}\right)=\\\\\left(\begin{matrix}0-(-2) & -3-1 & -2-1 \\-1-4 & 1-5& 0-6 \\5-3 & 6-0 & 7-(-2)\end{matrix}\right)=\\\\\left(\begin{matrix}0+2 & -4 & -3 \\-5 & -4 & -6 \\2 & 6 & 7+2\end{matrix}\right)=\\\\\left(\begin{matrix}2 & -4 & -3 \\-5 & -4 & -6 \\2 & 6 & 9\end{matrix}\right)[/tex]

[tex]\left(\begin{matrix}-7 & 9 \\4 & 6\end{matrix}\right)-\left(\begin{matrix}0 & -11 \\2 &4\end{matrix}\right)=\left(\begin{matrix}-7-0 & 9-(-11) \\4-2 & 6-4\end{matrix}\right)=\\\\\\\left(\begin{matrix}-7 & 9+11 \\2& 2\end{matrix}\right)=\left(\begin{matrix}-7 & 20 \\2 & 2\end{matrix}\right)[/tex]