import math
def lcm2(a: int, b: int) -> int:
return math.lcm(a, b)
def lcm_coprime(a: int, b: int) -> int:
return math.lcm(a, b)
def lcm_zero(a: int, b: int) -> int:
# lcm with a zero operand is 0.
return math.lcm(a, b)
def lcm_negative(a: int, b: int) -> int:
# lcm is over absolute values.
return math.lcm(a, b)