Problem:
Add the two matrices
$\left(
\begin{array}{cccc}
 9 & 7 & -8 & 0 \\
\end{array}
\right)$ and
$\left(
\begin{array}{cccc}
 6 & 5 & -8 & -9 \\
\end{array}
\right)$
Answer:
$\left(
\begin{array}{cccc}
 15 & 12 & -16 & -9 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/add/33498.txt'}