Answer
$\left[\begin{array}{lll}
0 & 2 & 3\\
8 & 1 & 3
\end{array}\right]$
Work Step by Step
To add two matrices, they must have the same order.
The resulting matrix has elements obtained by adding the corresponding elements of the two matrices.
A and D are both $2\times 3 $ matrices (can be added),
$A+D=\left[\begin{array}{lll}
2+(-2) & -1+3 & 2+1\\
5+3 & 3+(-2) & -1+4
\end{array}\right]$
=$\left[\begin{array}{lll}
0 & 2 & 3\\
8 & 1 & 3
\end{array}\right]$
