diff --git a/src/main/py/read_math_function.py b/src/main/py/read_math_function.py
index 815b256..7507e13 100644
--- a/src/main/py/read_math_function.py
+++ b/src/main/py/read_math_function.py
@@ -7,7 +7,12 @@ def read_math_function():
         print("k - verkettete Funktionen (Demnächst verfügbar)")
         print("x - Ich möchte nichts mehr einlesen lassen")
         type = input("Zur Zeit können nur Konstanten eingelesen werden. Bitte geben Sie den Typ ihrer Funktion ein:" )
-        if type == "x":
+        if type != "x":
+            function = input("Ihre Funktion: ")
+            simplified = simplify_constant(type, function)
+            return simplified
+
+        else:
             return False
 
 
diff --git a/src/test/py/test_read_math_function.py b/src/test/py/test_read_math_function.py
index 0ca4581..5b37c78 100644
--- a/src/test/py/test_read_math_function.py
+++ b/src/test/py/test_read_math_function.py
@@ -28,6 +28,9 @@ class read_function(unittest.TestCase):
     def test_read_math_function_false_if_enter_x(self, mock_input):
         result = read_math_function()
         self.assertFalse(result)
+    @patch('builtins.input', side_effect=["c", "5"])
+    def test_read_math_function_return5_if_enter_c_5(self, mock_input):
+        self.assertEqual(read_math_function(), 5)
 
 if __name__ == '__main__':
     unittest.main()