refactoring: simplified return statement for difference_of_simplified_exponential_functions

src/main/py/read_math_function.py

@@ -129,7 +129,6 @@ def difference_of_simplified_exponential_functions(type, function):
     new_minuend = simplify_exponential_function('e', minuend)
     new_subtrahend = simplify_exponential_function('e', subtrahend)
     if new_minuend != "Der Ausdruck muss die Variable 'x' enthalten." and new_subtrahend != "Der Ausdruck muss die Variable 'x' enthalten.":
-        simplified = new_minuend - new_subtrahend
-        return simplified
+        return new_minuend - new_subtrahend
     else:
         return "Der Ausdruck muss die Variable 'x' enthalten."