1\documentclass{article} 2\usepackage{latexml} 3\usepackage{amsmath} 4\lxDeclare[role=ID]{$a$} 5\lxDeclare[role=ID]{$b$} 6\lxDeclare[role=ID]{$\Phi$} 7\lxDeclare[role=ID]{$\Psi$} 8\lxDeclare[role=ID]{$\mathcal{H}$} 9\lxDeclare[role=FUNCTION]{$F$} 10\begin{document} 11\[ a+b \] 12\[ F(a) \] 13\[ \frac{1}{(1+a_0)} \] 14\[ \int_a^b F(x) dx \] 15\[ a+F(a,b) \] 16\[ F(a,b) \] 17\[ F(a) + \binom{a}{b} \] 18\[ \left\langle\Psi\middle|\mathcal{H}\middle|\Phi\right\rangle 19 + \defint{a}{b}{F(x)}{x} \] 20\[ \baddefint{a}{b}{F(x)}{x} \] 21\[ \binom{F(a)}{a+b} \] 22\end{document}