+snippet ibeg "inline enviroment" w
+\begin{$1} $2 \end{$1} $0
+endsnippet
+
+snippet ibmat "inline bmatrix" w
+\begin{bmatrix} $1 \end{bmatrix} $0
+endsnippet
+
+snippet ibsmat "inline small bmatrix" w
+\begin{bsmallmatrix} $1 \end{bsmallmatrix} $0
+endsnippet
+