\DETERMINANT(1,-1,2;3,0,5;-1,1,4){\sol}
\SpecialUsageIndex{\DETERMINANT}%
$\begin{vmatrix}
       1 & -1 & 2 \\ 3 & 0 & 5 \\ -1 & 1 & 4
     \end{vmatrix}=\sol$