diff --git a/Week04/decorators_oleksii_rak.py b/Week04/decorators_oleksii_rak.py
new file mode 100644
index 00000000..32e8d7a4
--- /dev/null
+++ b/Week04/decorators_oleksii_rak.py
@@ -0,0 +1,28 @@
+import time
+import tracemalloc
+from functools import wraps
+
+def performance(func):
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        performance.counter += 1
+        
+        tracemalloc.start()
+        start_time = time.perf_counter()
+        
+        result = func(*args, **kwargs)
+        
+        end_time = time.perf_counter()
+        _, peak_mem = tracemalloc.get_traced_memory()
+        tracemalloc.stop()
+
+        performance.total_time += (end_time - start_time)
+        performance.total_mem += peak_mem
+        
+        return result
+
+    return wrapper
+
+performance.counter = 0
+performance.total_time = 0.0
+performance.total_mem = 0
diff --git a/Week04/functions_oleksii_rak.py b/Week04/functions_oleksii_rak.py
new file mode 100644
index 00000000..a9767452
--- /dev/null
+++ b/Week04/functions_oleksii_rak.py
@@ -0,0 +1,25 @@
+custom_power = lambda x=0, /, e=1: float(x ** e)
+
+def custom_equation(x: int = 0, y: int = 0, /, a: int = 1, b: int = 1, *, c: int = 1) -> float:
+    """
+    Calculates a custom equation: (x**a + y**b) / c.
+
+    :param x: The first base (positional-only).
+    :param y: The second base (positional-only).
+    :param a: The first exponent (positional-or-keyword).
+    :param b: The second exponent (positional-or-keyword).
+    :param c: The divisor (keyword-only).
+    :return: The result of the equation as a float.
+    """
+    return float((x ** a + y ** b) / c)
+
+def fn_w_counter() -> (int, dict[str, int]):
+    if not hasattr(fn_w_counter, 'total_calls'):
+        fn_w_counter.total_calls = 0
+        fn_w_counter.callers_dict = {}
+    
+    fn_w_counter.total_calls += 1
+    
+    fn_w_counter.callers_dict[__name__] = fn_w_counter.callers_dict.get(__name__, 0) + 1
+    
+    return fn_w_counter.total_calls, fn_w_counter.callers_dict
diff --git a/Week05/awaitme_oleksii_rak.py b/Week05/awaitme_oleksii_rak.py
new file mode 100644
index 00000000..c6cfcc9a
--- /dev/null
+++ b/Week05/awaitme_oleksii_rak.py
@@ -0,0 +1,11 @@
+import inspect
+from functools import wraps
+
+def awaitme(func):
+    @wraps(func)
+    async def wrapper(*args, **kwargs):
+        if inspect.iscoroutinefunction(func):
+            return await func(*args, **kwargs)
+        return func(*args, **kwargs)
+    
+    return wrapper
diff --git a/Week06/timer_oleksii_rak.py b/Week06/timer_oleksii_rak.py
new file mode 100644
index 00000000..7bfa47e6
--- /dev/null
+++ b/Week06/timer_oleksii_rak.py
@@ -0,0 +1,13 @@
+from time import perf_counter
+
+class Timer:
+    def __init__(self):
+        self.start_time = 0.0
+        self.end_time = 0.0
+
+    def __enter__(self):
+        self.start_time = perf_counter()
+        return self
+      
+    def __exit__(self, *args):
+        self.end_time = perf_counter()
diff --git a/Week07/threaded_oleksii_rak.py b/Week07/threaded_oleksii_rak.py
new file mode 100644
index 00000000..c50c23ae
--- /dev/null
+++ b/Week07/threaded_oleksii_rak.py
@@ -0,0 +1,21 @@
+import threading
+from functools import wraps
+
+def threaded(n: int):
+    def decorator(func):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            threads = []
+            
+            for _ in range(n):
+                t = threading.Thread(target=func, args=args, kwargs=kwargs)
+                threads.append(t)
+            
+            for t in threads:
+                t.start()
+            
+            for t in threads:
+                t.join()
+                
+        return wrapper
+    return decorator