diff --git a/HW2_Bredov/2023-09-13.png b/HW2_Bredov/2023-09-13.png
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diff --git a/HW2_Bredov/README.md b/HW2_Bredov/README.md
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+Script `calculator.py` performs all basic operations: addition, subtraction, multiplication and division.
+
+Credits:
+
+*   Bobkov Gleb A. - implemented division;
+*   Bagrova Olga E. - implemented addition;
+*   Smertina Elena - implemented multiplication;
+*   Matach Dmitri A. - implemented subtraction;
+*   Bredov Denis V. - implemented `main()` function & team lead.
+
+![Development crew](./2023-09-13.png "Development crew")
diff --git a/HW2_Bredov/calculator.py b/HW2_Bredov/calculator.py
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+def divide(a, b):
+  return a/b
+
+def add(a,b):
+    return a+b
+
+def multiply(x,y):
+    return(x*y)
+  
+def subtract(eq1,eq2):
+	return(eq1-eq2)
+
+def main():
+#   eq = [int(i) if i.isdigit() else i for i in input().split()]
+    eq = input().split()
+    match eq[1]:
+        case "+":
+            return add(int(eq[0]), int(eq[2]))
+        case "-":
+            return subtract(int(eq[0]), int(eq[2]))
+        case "*":
+            return multiply(int(eq[0]), int(eq[2]))
+        case "/":
+            return divide(int(eq[0]), int(eq[2]))
+main()