Update app.py

app.py

@@ -16,7 +16,8 @@ def sum_of_two_numbers(arg1:int, arg2:int)-> int: #it's import to specify the re
         arg1: the first number
         arg2: the second number
     """
-    return arg1+arg2
+    sum = arg1+arg2
+    return sum
 
 @tool
 def difference_of_two_numbers(arg1:int, arg2:int)-> int: 
@@ -26,7 +27,8 @@ def difference_of_two_numbers(arg1:int, arg2:int)-> int:
         arg1: the first number
         arg2: the second number
     """
-    return arg1-arg2
+    diff = arg1 - arg2
+    return diff
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: