Solve {ccc}{6}&{2}&{1}{13}&{1}&{0}{4}&{0}&{0}{ccc}{(-3)}&{0}&{0}{0}&{1}&{n}{0}&{0}&{1}{ccc}{0}&{0}&{1/4}{0}&{1}&{-13/4}{1}&{-2}&{5}

$$\left( \begin{array} { c c c } { 6 } & { 2 } & { 1 } \\ { 13 } & { 1 } & { 0 } \\ { 4 } & { 0 } & { 0 } \end{array} \right) \left( \begin{array} { c c c } { ( - 3 ) } & { 0 } & { 0 } \\ { 0 } & { 1 } & { n } \\ { 0 } & { 0 } & { 1 } \end{array} \right) \left( \begin{array} { c c c } { 0 } & { 0 } & { 1 / 4 } \\ { 0 } & { 1 } & { - 13 / 4 } \\ { 1 } & { - 2 } & { 5 } \end{array} \right)$$

Evaluate

$$\left(\begin{matrix}2n+1&-4n&10n-6\\n&1-2n&5n-13\\0&0&-3\end{matrix}\right)$$

Calculate Determinant

$$-3$$