diff --git a/src/main/py/read_math_function.py b/src/main/py/read_math_function.py
index 6886de1..1d250a8 100644
--- a/src/main/py/read_math_function.py
+++ b/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."
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