"""
Implementation file for APFD tests. Contains redundant functions that are actually
not used anywhere. Every function gets 1 mutant per second order high order mutation testing (SOMT)
"""


def sum(a, b):
    return a + b

def subtract(a, b):
    return a - b

def mul(a, b):
    return a*b

def div(a, b):
    return a / b