find the ones digit of 73 ^ 350
"3,9 , 7,1 repeats after every four times therefore 350 / 4 = 87 + 2 remainder 9 is the ones digit so e is correct"
subtract(power(subtract(73, multiply(add(const_3, const_4), const_10)), subtract(350, multiply(floor(divide(350, const_4)), const_4))), multiply(const_2, const_10))