determinant{{0,a_{11},a_{12},a_{13},0,0,0},{0,1,0,0,a_{22},a_{23},0},{0,0,1,0,a_{21},0,a_{23}},{0,0,0,1,0,a_{21},a_{22}},{a_{33},0,0,0,1,0,0},{a_{32},0,0,0,0,1,0},{a_{31},0,0,0,0,0,1}}

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