Problem:
Compute the trace of
$\left(
\begin{array}{ccccc}
 10 & -6 & -10 & 1 & -7 \\
 -1 & 4 & 7 & -6 & 6 \\
 3 & -1 & -10 & -3 & 6 \\
 7 & 9 & 1 & -8 & 6 \\
 2 & 9 & -8 & 4 & 6 \\
\end{array}
\right)$.
Answer:
$2$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/trace/36179.txt'}