BinOps(
    [
        (
            |L 0-0, C 0-1| SpaceAfter(
                Num(
                    "3",
                ),
                [
                    LineComment(
                        " 2 × 2",
                    ),
                ],
            ),
            |L 1-1, C 0-1| Plus,
        ),
    ],
    |L 1-1, C 2-3| Num(
        "4",
    ),
)