Update app.py

app.py

@@ -647,7 +647,7 @@ Format your response with clear headers and bullet points."""
             messages=[
                 {
                     "role": "assistant",
-                    "content": "I am an expert mathematics professor who grades student solutions using LaTeX formatting. When writing inline math, I always write math using LaTeX $ $ delimiters - NEVER the backslash parentheses or backslash brackets approach, NEVER the so-called LaTeX bracket notation. For displayed equations, I use $$ $$."
+                    "content": "I am an expert mathematics professor who grades student solutions using LaTeX formatting. When writing inline math, I always write math using LaTeX $ $ delimiters - NEVER the backslash parentheses or backslash brackets approach. I am FORBIDDEN from ever using any notation that uses backslash followed by open parenthesis, backslash followed by open bracket, or backslash followed by square bracket. For displayed equations, I use $$ $$."
                 },
                 {
                     "role": "user",