\begin{aligned} & |\mathrm{A}|=\frac{1}{2}, \operatorname{trace}(\mathrm{~A})=3, \mathrm{~B}=\operatorname{adj}(\operatorname{adj}(2 \mathrm{~A}))=|2 \mathrm{~A}|^{\mathrm{n}-2}(2 \mathrm{~A}) \\ & \mathrm{n}=3, \mathrm{~B}=|2 \mathrm{~A}|(2 \mathrm{~A})=2^3 \cdot|\mathrm{~A}|(2 \mathrm{~A})=8 \mathrm{~A} \\ & |\mathrm{~B}|=|8 \mathrm{~A}|=8^3 \cdot|\mathrm{~A}|=2^8=256 \\ & \operatorname{trace}(\mathrm{~B})=8 \operatorname{trace}(\mathrm{~A})=24 \\ & |\mathrm{~B}|+\operatorname{trace}(\mathrm{B})=280 \end{aligned}