diff --git a/md2img/scripts/render.js b/md2img/scripts/render.js
index 362f76a..d7d7331 100644
--- a/md2img/scripts/render.js
+++ b/md2img/scripts/render.js
@@ -121,6 +121,25 @@ const blockMathExtension = {
   },
 };
 
+// marked extension for inline math \(...\)
+const bracketInlineMathExtension = {
+  name: 'bracketInlineMath',
+  level: 'inline',
+  start(src) {
+    const idx = src.indexOf('\\(');
+    return idx === -1 ? undefined : idx;
+  },
+  tokenizer(src) {
+    const match = src.match(/^\\\((.+?)\\\)/);
+    if (match) {
+      return { type: 'bracketInlineMath', raw: match[0], text: match[1].trim() };
+    }
+  },
+  renderer(token) {
+    return renderMath(token.text, false);
+  },
+};
+
 // marked extension for \[...\] block math
 const bracketMathExtension = {
   name: 'bracketMath',
@@ -186,6 +205,7 @@ marked.use({
   extensions: [
     blockMathExtension,
     bracketMathExtension,
+    bracketInlineMathExtension,
     envMathExtension,
     mathExtension,
   ],