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[tex]\begin{bmatrix}{\square} & {\square} & {\square} & {\square} \\ {\square} & {\square} & {\square} & {\square} \\ {\square} & {\square} & {\square} & {\square} \\ {\square} & {\square} & {\square} & {\square}\end{bmatrix}\cos \sin ^{-1}\sqrt[\square]{\square}[/tex]
