protected override Result <TextAtom> LaTeXToContent(string latex) => TextLaTeXParser.TextAtomFromLaTeX(latex);
protected override string ContentToLaTeX(TextAtom mathList) => TextLaTeXParser.TextAtomToLaTeX(mathList).ToString();
TextAtom Parse(string latex) => TextLaTeXParser.TextAtomFromLaTeX(latex) .Match(atom => atom, error => throw new Xunit.Sdk.XunitException(error));