1 2 3 4 5 6 7
assert |2 * 2 + 1 == 5|; assert |2 + 2 * 3 == 8|; assert |2 * (2 + 1) == 6|; assert |2 * 2 + 1 > 4|; assert |2 * 2 + 1 < 6|; assert |2 * 2 + 1 >= 5|; assert |2 * 2 + 1 <= 5|;