diff --git a/Homework_4.py b/Homework_4.py
new file mode 100644
index 0000000..c4a0c0d
--- /dev/null
+++ b/Homework_4.py
@@ -0,0 +1,84 @@
+# Task 1
+
+from sys import argv
+
+ar1, ar2, ar3 = map(float, argv[1:])
+salary = ar1 * ar2 + ar3
+
+print(f'Заработная плата составляет {salary} руб')
+
+# Task 2
+
+
+n = [300, 2, 12, 44, 1, 1, 4, 10, 7, 1, 78, 123, 55]
+new = [n[i] for i in range(1, len(n)) if n[i] > n[i - 1]]
+print(new)
+
+# Task 3
+
+
+my_list = [i for i in range(20, 241) if i % 20 == 0 or i % 21 == 0]
+print(my_list)
+
+# Task 4
+
+
+n = [2, 2, 2, 7, 23, 1, 44, 44, 3, 2, 10, 7, 4, 11]
+new = [n[i] for i in range(len(n)) for k in range(len(n)) if i != k and n[i] == n[k]]
+my_list = [n[i] for i in range(len(n)) if not n[i] in new]
+
+print(my_list)
+
+# Task 5
+
+
+from functools import reduce
+
+
+def my_func(el_1, el_2):
+    return el_1 * el_2
+
+
+my_list = [i for i in range(100, 1001) if i % 2 == 0]
+
+print(my_list)
+print(f'Произведение всех четных чисел от 100 до 1000 равно {reduce(my_func, my_list)}')
+
+# Task 6
+
+from itertools import count, cycle
+
+
+for el in count(3, 1):
+    if el > 10:
+        break
+    else:
+        print(el)
+
+list = [12, 44, 4, 10, 78, 123]
+c = 0
+for el in cycle(list):
+    if c < 25:
+        print(el)
+        c += 1
+    else:
+        break
+
+# Task 7
+
+
+def fact(n):
+    k = 1
+    for i in range(1, n + 1):
+        k = k * i
+        yield(k)
+
+
+n = int(input('Введите n для вычисления факториала '))
+
+if n == 0:
+    print('1')
+
+for el in fact(n):
+    print(el)
+