Update app.py

app.py

@@ -133,6 +133,7 @@ def render_message(history):
     messages_html += """
         </div></div>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/2.3.3/purify.min.js"></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.js"></script>
         <script>
             function escapeHtml(unsafe) {
             return unsafe
@@ -142,8 +143,9 @@ def render_message(history):
                 .replace(/"/g, "&quot;")
                 .replace(/'/g, "&#039;");
             }
-            let message = document.getElementById('message-content').innerHTML
+            let message = document.getElementById('message-content').innerHTML;
             document.getElementById('message-content').innerHTML = escapeHtml(message);
+            MathJax.typeset();  // Process math expressions
         </script>
         """ 
     return messages_html