Update mathjax regex

background/mathjax.js

@@ -2,11 +2,11 @@
 md.mathjax = () => {
 
   var delimiters = new RegExp([
-    /\$\$[^`][\s\S]+?\$\$/,
-    /\\\([^`][\s\S]+?\\\)/,
-    /\\\[[^`][\s\S]+?\\\]/,
-    /\\begin\{.*?\}[^`][\s\S]+?\\end\{.*?\}/,
-    /\$[^$`].+?\$/,
+    /\$\$[^`]*?\$\$/,
+    /\\\([^`]*?\\\)/,
+    /\\\[[^`]*?\\\]/,
+    /\\begin\{.*?\}[^`]*?\\end\{.*?\}/,
+    /\$[^`\n]*?\$/,
   ]
   .map((regex) => `(?:${regex.source})`).join('|'), 'gi')