Answer
$\begin{bmatrix} -8 & -7 \\ 15 & -1 \end{bmatrix}$
Work Step by Step
$\begin{bmatrix} -5 & 0 \\ 3 & -6 \end{bmatrix}+\begin{bmatrix} 7 & 1 \\ -2 & -1 \end{bmatrix}+\begin{bmatrix} -10 & -8 \\ 14 & 6 \end{bmatrix}=\begin{bmatrix} -5+7-10 & 0+1-8 \\ 3-2+14 & -6-1+6 \end{bmatrix}=\begin{bmatrix} -8 & -7 \\ 15 & -1 \end{bmatrix}$
