diff --git a/modules/neovim/coc/snippets/all.snippets b/modules/neovim/coc/snippets/all.snippets
index 2ed085b..cb64ed3 100644
--- a/modules/neovim/coc/snippets/all.snippets
+++ b/modules/neovim/coc/snippets/all.snippets
@@ -1,3 +1,3 @@
-snippet visual "Get back the visual selection without any extra trimmings"
+snippet visual "Get back the visual selection without any extra trimmings" i
 ${VISUAL}
 endsnippet
diff --git a/modules/neovim/coc/snippets/markdown.snippets b/modules/neovim/coc/snippets/markdown.snippets
index 041cddc..b6e7af8 100644
--- a/modules/neovim/coc/snippets/markdown.snippets
+++ b/modules/neovim/coc/snippets/markdown.snippets
@@ -40,7 +40,7 @@
 endsnippet
 
 snippet intd "Integrate definitely" i
-\int{${1}}{${2}}${3} \text{ d}${4:x}${0}
+\int^{${1}}_{${2}}${3} \text{ d}${4:x}${0}
 endsnippet
 
 snippet ihat "The I vector" i
@@ -80,3 +80,7 @@
 snippet 2x2matrix "A 2 by 2 matrix" i
 \begin{bmatrix} ${1} & ${2} \\\\ ${3} & ${4} \end{bmatrix}${0}
 endsnippet
+
+snippet sum "A sum" i
+\sum^{${1:n}}_{${2:r}=${3:1}}${4}${0}
+endsnippet