diff --git a/.github/workflows/flake8_kyu2.yml b/.github/workflows/flake8_kyu2.yml
index 0ba0c59bfab..3f848fe08e3 100644
--- a/.github/workflows/flake8_kyu2.yml
+++ b/.github/workflows/flake8_kyu2.yml
@@ -42,6 +42,6 @@ jobs:
         # exit-zero treats all errors as warnings.
         # The GitHub editor is 127 chars wide
         run: |
-          flake8 /kyu_2 --count --select=E9,F63,F7,F82 --doctests --show-source --statistics
-          flake8 . --count --max-complexity=10 --max-line-length=127 --benchmark --show-source --statistics
+          flake8 --count --select=E9,F63,F7,F82 --doctests --show-source --statistics ./kyu_2
+          flake8 --count --max-complexity=10 --max-line-length=127 --benchmark --show-source --statistics ./kyu_2
         # yamllint enable rule:line-length
\ No newline at end of file
diff --git a/kyu_2/evaluate_mathematical_expression/evaluate.py b/kyu_2/evaluate_mathematical_expression/evaluate.py
index ed24d33d52b..6c297d42e48 100644
--- a/kyu_2/evaluate_mathematical_expression/evaluate.py
+++ b/kyu_2/evaluate_mathematical_expression/evaluate.py
@@ -51,50 +51,6 @@ def process_math_expression(string: str, operators: list) -> str:
     return ' '.join(strings)
 
 
-def normalize_string(string: str) -> str:
-    """
-    Normalizing string input
-    :param string: str
-    :return: str
-    """
-    strings: list = []
-    string_temp: str = ''.join([s for s in string if s != ' '])
-
-    while string_temp != '':
-        temp: str = ''
-
-        for i, s in enumerate(string_temp):
-            if s.isdigit():
-                temp += s
-
-            if s in '()':
-                if temp != '':
-                    strings.append(temp)
-                strings.append(s)
-
-                if i + 1 < len(string_temp):
-                    string_temp = string_temp[i + 1:]
-                else:
-                    string_temp = ''
-                break
-
-            if s in OPERATORS:
-                if temp != '':
-                    strings.append(temp)
-                strings.append(s)
-
-                if i + 1 < len(string_temp):
-                    string_temp = string_temp[i + 1:]
-                break
-
-            if i == len(string_temp) - 1:
-                if temp != '':
-                    strings.append(temp)
-                string_temp = ''
-
-    return ' '.join([s for s in strings if s != ''])
-
-
 def bracket_start(strings: list) -> int:
     """
     Return index of first (open) bracket
@@ -180,7 +136,7 @@ def process_duplicate_minus(string: str) -> str:
                     del strings[i]
                     break
 
-    return ' '.join([s for s in strings if s != ''])
+    return ' '.join(strings)
 
 
 def calc(string: str) -> float:
@@ -189,9 +145,16 @@ def calc(string: str) -> float:
     :param string: str
     :return: float
     """
-    string = normalize_string(string)
+    string = ''.join([s for s in string if s != ' '])
+
+    strings: list = []
+    while string:
+        temp: str = ''
+        temp, string = check_conditions(strings, string, temp)
+    string = ' '.join(strings)
+
     string = ''.join(string.split('+'))
-    strings: list = string.split()
+    strings = string.split()
     string = process_brackets(strings)
     string = process_duplicate_minus(string)
     string = process_math_expression(string, ['*', '/'])
@@ -199,3 +162,42 @@ def calc(string: str) -> float:
     string_lst = [float(s) for s in string_lst]
     string = str(sum(string_lst))
     return float(string)
+
+
+def check_conditions(strings: list, string: str, temp: str) -> tuple[str, str]:
+    """
+    Normalizing string input by checking conditions
+    :param strings: list
+    :param string: str
+    :param temp: str
+    :return: tuple(str, str)
+    """
+    for i, s in enumerate(string):
+        if s.isdigit():
+            temp += s
+
+        if (s in ''.join(OPERATORS) + '()' or i == len(string) - 1) and temp:
+            strings.append(temp)
+
+        if s in '()':
+            strings.append(s)
+
+            if i + 1 < len(string):
+                string = string[i + 1:]
+            else:
+                string = ''
+
+            break
+
+        if s in OPERATORS:
+            strings.append(s)
+
+            if i + 1 < len(string):
+                string = string[i + 1:]
+
+            break
+
+        if i == len(string) - 1:
+            string = ''
+
+    return temp, string
diff --git a/kyu_2/evaluate_mathematical_expression/test_evaluate.py b/kyu_2/evaluate_mathematical_expression/test_evaluate.py
index 9851b41495b..cb9f8073717 100644
--- a/kyu_2/evaluate_mathematical_expression/test_evaluate.py
+++ b/kyu_2/evaluate_mathematical_expression/test_evaluate.py
@@ -78,8 +78,7 @@ def test_calc(self):
             ['-(-93) / (-36 + 26 + -(18)) + (-7 * -(((-(-67 + -95)))) + -9)', 1121.6785714285713],
             ['-(-23) + (-4 * -13 + -(1)) - (-30 / (((-(57 + -20)))) + 85)', -11.810810810810807],
             ['(72) / (-82 - -93 * -(88)) + (-18 - -(((-(60 * 97)))) + -79)', -5917.00871037987],
-            ['-(77) / (7 * -76 + (59)) + (98 / -(((-(-74 - -47)))) / -5)', 0.8887166236003445]
-        )
+            ['-(77) / (7 * -76 + (59)) + (98 / -(((-(-74 - -47)))) / -5)', 0.8887166236003445])
 
         for string, expected in test_data: