diff --git a/Week04/functions_heval_sogut.py b/Week04/functions_heval_sogut.py
new file mode 100644
index 00000000..cc360deb
--- /dev/null
+++ b/Week04/functions_heval_sogut.py
@@ -0,0 +1,53 @@
+# custom_power
+custom_power = lambda x=0, /, e=1: x**e
+
+# custom_equation
+def custom_equation(x: int = 0, y: int = 0, /, a: int = 1, b: int = 1, *, c: int = 1) -> float:
+    """
+    Calculates the result of the equation (x**a + y**b) / c.
+
+    :param x: The first base number (positional-only).
+    :param y: The second base number (positional-only).
+    :param a: The exponent for x (positional-or-keyword).
+    :param b: The exponent for y (positional-or-keyword).
+    :param c: The divisor (keyword-only).
+    :return: The float result of the equation.
+    """
+    # Manual type checking to raise TypeError
+    if not isinstance(x, int):
+        raise TypeError("x must be an integer")
+    if not isinstance(y, int):
+        raise TypeError("y must be an integer")
+    if not isinstance(a, int):
+        raise TypeError("a must be an integer")
+    if not isinstance(b, int):
+        raise TypeError("b must be an integer")
+    if not isinstance(c, int):
+        raise TypeError("c must be an integer")
+    
+    # The calculation, which will return a float
+    return (x**a + y**b) / c
+
+# fn_w_counter
+def fn_w_counter() -> (int, dict[str, int]):
+    """
+    Counts the total number of times this function has been called.
+
+    This function uses an attribute 'count' on itself to store the call count,
+    avoiding the use of a global variable.
+
+    Returns the total count and a dictionary where the key is this
+    module's __name__ and the value is the total count.
+
+    :return: A tuple of (total_calls, {__name__: total_calls})
+    :rtype: (int, dict[str, int])
+    """
+    # Initialize the counter on the function object if it doesn't exist
+    if not hasattr(fn_w_counter, "count"):
+        fn_w_counter.count = 0
+    
+    # Increment the counter
+    fn_w_counter.count += 1
+    
+    # Return the total count and the dictionary as specified
+    return (fn_w_counter.count, {__name__: fn_w_counter.count})