Problem:
Compute the trace of
$\left(
\begin{array}{cc}
 -2 \sqrt{3} & -6 \sqrt{3} \\
 2 \sqrt{3} & -\sqrt{3} \\
\end{array}
\right)$.
Answer:
$-3 \sqrt{3}$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/trace/2400.txt'}