Problem:
Compute the trace of
$\left(
\begin{array}{cccccc}
 \frac{15}{2} & -1 & -\frac{3}{2} & \frac{7}{2} & -\frac{3}{2} & \frac{9}{2} \\
 -\frac{3}{2} & -10 & -4 & -3 & \frac{19}{2} & 9 \\
 \frac{19}{2} & -10 & 1 & \frac{15}{2} & \frac{9}{2} & -4 \\
 1 & -\frac{1}{2} & \frac{1}{2} & -\frac{7}{2} & -\frac{5}{2} & 0 \\
 \frac{19}{2} & -\frac{19}{2} & 2 & \frac{11}{2} & -\frac{1}{2} & \frac{1}{2} \\
 -6 & 3 & -\frac{5}{2} & 10 & -\frac{13}{2} & -6 \\
\end{array}
\right)$.
Answer:
$-\frac{23}{2}$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/trace/38572.txt'}