deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 6df98bd..44d2a47 100644  --- a/untitled.tex  +++ b/untitled.tex 
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Now I have a conditional equation:  $$ {{\partial \Phi } \over {\partial {X_{\text{P}}}}} =   {\begin{cases}  - \begin{cases}  {-  78.9\text{, if } {X_{\text{P}}} < 0.34,\\ - 628.3\text{, if } {X_{\text{P}}} \ge 0.34  \end{cases}} 0.34}  \end{cases}  \label{eq:comp} $$ Can this equation be displayed correctly in LaTeXML? I also want to reference Eq. (\ref{eq:comp}).