fix equations generated

Author: neagualexa

src/agents/utils/prompt_context_templates.py

@@ -73,8 +73,9 @@ def format_question_header(
 - Description: {content}
 {duration_text}
 
-> Note: Mathematical equations are in KaTeX format, preserve them the same. Ensure mathematical equations are surrounded by one '$' for in-line equations and '$$' for block equations. Use British English spellings.
-
+> Note: Mathematical equations are in KaTeX format, preserve them the same. Ensure mathematical equations are surrounded by one '$' for in-line equations and '$$' for block equations. 
+Example: '$E=mc^2$' or '$$E=mc^2$$'.
+Use British English spellings.
 ---
 """