How to use the latex2mathml.aggregator.aggregate function in latex2mathml

def test_missing_right(name: str, latex: str, exception: Exception):
    with pytest.raises(exception):
        aggregate(latex)

def test_aggregator(name: str, latex: str, expected: list):
    assert aggregate(latex) == expected

def convert(
    latex: str,
    xmlns: str = "http://www.w3.org/1998/Math/MathML",
    display: str = "inline",
) -> str:
    math = Element("math", xmlns=xmlns, display=display)
    row = SubElement(math, "mrow")
    _classify_subgroup(aggregate(latex), row)
    return _convert(math)