deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 44d2a47..3e9e682 100644  --- a/untitled.tex  +++ b/untitled.tex 
...
Now I have a conditional equation:  $$ {{\partial \Phi } \over {\partial {X_{\text{P}}}}} =   \begin{cases}  {- -  78.9\text{, if } {X_{\text{P}}} < 0.34,\\ - 628.3\text{, if } {X_{\text{P}}} \ge 0.34} 0.34  \end{cases} \label{eq:comp} $$  Can this equation be displayed correctly in LaTeXML? I also want to reference Eq. (\ref{eq:comp}).