ewenvironment{aMatrix}[1]{\left(\begin{array}{#1}}{\end{array}ight)} \begin{aMatrix}{cc} 2 & 4 \\ 6 & -90 \end{aMatrix} Alternatively, one can use the pmatrix, bmatrix, and vmatrix environments of the amsmath package (http://selinap.com/2009/05/how-to-create-a-matrix-in-latex/ as described here). This article is a . You can help My English Wiki by expanding it.