This program raises "math is not defined error" How do I fix this error?

Question

from math import sqrt
print(math.sqrt(25)) #error statement

Answer 1

Or:

from math import sqrt as sqrt
print(sqrt(25))

Answer 2

import math

x = math.isqrt(25)
print(x) # no error statement

Answer 3

import math
print(math.sqrt(25))