Go to "preferences -> key binding (user)"
[ { "keys": ["alt+shift+m"], "command": "insert_snippet", "args": { "name": "Packages/mediawiki/math-tag.sublime-snippet" } } ]
Create `Packages/mediawiki/math-tag.sublime-snippet`:
<snippet> <content><![CDATA[<math>${2:$SELECTION}</math>]]></content> <scope>math</scope> <description>Math Tag</description> </snippet>
You don't need to create an XML file, and can pass arguments directly to snippets: [1]
[ {"keys": ["alt+q"], "command": "insert_snippet", "args": {"contents": "<code>${0:$TM_SELECTED_TEXT}</code>"}}, {"keys": ["alt+w"], "command": "insert_snippet", "args": {"contents": "<pre>${0:$TM_SELECTED_TEXT}</pre>"}} ]
Add this to "settings -> user" to enable spell checking for English [2]
{ "spell_check": true, "dictionary": "Packages/Language - English/en_US.dic" }