\(\begin{vmatrix} 1 & 2 \\ 3 & 4 \end{vmatrix} \)

\(\begin{vmatrix} -3 & 5 \\ -6 & 7 \end{vmatrix} \)

\(\begin{vmatrix} 1 & 2 & 3 \\ 4 & 5 & 0 \\ 7 & 8 & 9 \end{vmatrix} \)