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;
|;
assert |
    2 / 2  == 1;
|;
assert |
    2 - 1 == 1;
|;