update

UltiSnips/markdown.snippets

@@ -1,5 +1,5 @@
 snippet l "[...](...)"
-[${1:title}](${2:url})
+[${1:title}](${2:url})$0
 endsnippet
 
 snippet c "``` ..."
@@ -8,14 +8,43 @@ snippet c "``` ..."
 endsnippet
 
 # latex
-snippet vc "vector"
-\\begin{bmatrix} $1 \\\\ $2 \\end{bmatrix}
+snippet vec "vector"
+\\begin{bmatrix} $1 \\\\ $2 \\end{bmatrix}$0
 endsnippet
 
 snippet mx "matrix"
-\\begin{bmatrix} $1 & $2 \\\\ $3 & $4 \\end{bmatrix}
+\\begin{bmatrix} $1 & $2 \\\\ $3 & $4 \\end{bmatrix}$0
+endsnippet
+
+snippet lim "limit"
+\\lim{$1 \\to $2}$0
+endsnippet
+
+snippet sum "sum"
+\\sum_{$1}^{$2}$0
+endsnippet
+
+snippet fr "fraction"
+\\frac{$1}{$2}$0
+endsnippet
+
+snippet br "{}"
+\\lbrace $1 \\rbrace$0
+endsnippet
+
+snippet | "|...|"
+\\lvert $1 \\rvert$0
+endsnippet
+
+snippet || "|...|"
+\\lVert $1 \\rVert$0
+endsnippet
+
+snippet ds "displaystyle"
+\\displaystyle$0
 endsnippet
 
 snippet lmb "lambda" i
 \\lambda$0
 endsnippet
+