Update app.py

app.py

@@ -45,7 +45,7 @@ def perform_web_search(query: str) -> str:
     return result
 
 @tool
-perform_mathematical_operations(expression: str) -> float:
+def perform_mathematical_operations(expression: str) -> float:
     """A tool that takes a string as a simple mathematical expression, evaluates it, and returns the result
     Args:
         expression: a string that can be interpreted as a simple mathematical expression, syntactically correct without any changes.