034_numeric_chemistry_subscripts_in_mathrm_stay_structural.test

<<< tex
\frac{n_{\mathrm{H_2O}}}{n_{\mathrm{H_2}}}\qquad \text{or} \qquad \frac{p_{\mathrm{H_2O}}}{p_{\mathrm{H_2}}}
>>> starmath
{n_{nitalic{H_2 O}} over n_{nitalic{H_2}}}~~ "or"~~ {p_{nitalic{H_2 O}} over p_{nitalic{H_2}}}