Code: Select all
\begin{empheq}{align*}
\left|\begin{array}{ccc} 3&-2&1\\ -2&-4&-1\\ 2&-1&5 \end{array}\right|
\end{empheq}

But I can't find any way to do it. Any help would be appreciated.
Code: Select all
\begin{empheq}{align*}
\left|\begin{array}{ccc} 3&-2&1\\ -2&-4&-1\\ 2&-1&5 \end{array}\right|
\end{empheq}
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