Solve the Problem $| \mathrm { A } |$ By Expanding Down the Third Column

Essay

Solve the problem.
-Evaluate $| \mathrm { A } |$ by expanding down the third column. Show all your work.
$$A = \left[ \begin{array} { r r r r } - 2 & 0 & 0 & 2 \\3 & 1 & 0 & 0 \\4 & 5 & 6 & 4 \\- 2 & 2 & - 1 & 0\end{array} \right]$$