Limit latex equations to page width.

IPython/nbconvert/templates/latex/base.tplx

@@ -159,9 +159,9 b' This template does not define a docclass, the inheriting class must define this.'
 ((* block data_latex -*))
     ((*- if output.latex.startswith('$'): -*)) 
         ((= Replace $ symbols with more explicit, equation block. =))
-        \begin{equation*}
+        \begin{equation*}\adjustbox{max width=\textwidth}{$
         ((( output.latex | strip_dollars )))
-        \end{equation*}
+        $}\end{equation*}
     ((*- else -*))
         ((( output.latex )))
     ((*- endif *))