import math
a=4.5
x=-1.9
print("y = f(x):\n\t| y = math.tan(a)+x, если x < 0\n\t| \
y = math.(2*a)**0.5-math.sin(x), если 0 < = x < =1\n\t| y = x**3-a**3, если x > 1")
if x < 0:
y = math.tan(a)+x
print(y)
elif 0 <= x <= 1:
y = (2*a)**0.5-math.sin(x)
print(y)
elif x >1:
y = x**3-a**3
print(y)