import math

def ctg(number):

return math.cos(number) / math.sin(number)

x = int(input("X:"))

in_ctg = 15 * (x ** 3)

in_sqrt = (28 * x) - 4

in_cos = 37 * (x ** 2)

in_tan = 21 * x

in_fabs = math.cos(in_cos) + math.tan(in_tan)

numerator = ctg(in_ctg) + math.sqrt(in_sqrt)

denominator = math.fabs(in_fabs)

y = numerator / denominator

print(f"y = {y}")