diff --git a/Week04/functions_alp_ozdemir.py b/Week04/functions_alp_ozdemir.py
new file mode 100644
index 00000000..d65c5afa
--- /dev/null
+++ b/Week04/functions_alp_ozdemir.py
@@ -0,0 +1,25 @@
+custom_power = lambda x=0, /, e=1: x ** e
+
+def custom_equation(x: int = 0, y: int = 0, /, a: int = 1, b: int = 1, *, c: int = 1) -> float:
+    """
+    Calculates a specific equation based on inputs.
+    
+    :param x: The first base (positional only)
+    :param y: The second base (positional only)
+    :param a: The first exponent
+    :param b: The second exponent
+    :param c: The divisor (keyword only)
+    :return: The calculated float result
+    """
+    
+    if not all(isinstance(arg, int) for arg in [x, y, a, b, c]):
+        raise TypeError("All arguments must be integers")
+        
+    return float((x ** a + y ** b) / c)
+
+_counter = 0
+
+def fn_w_counter() -> (int, dict[str, int]): 
+    global _counter
+    _counter += 1
+    return _counter, {__name__: _counter}