At Mon, 19 Jan 2015 20:33:50 -0500,
John Kitchin wrote:
> 
> #+BEGIN_LaTeX
>     f =
>       \begin{cases}
>       t & 1\\
>       f & 2\\
>       \end{cases}
> #+END_LaTeX
> 
> seems to work.

almost: whether I use your suggestion or 
 
#+BEGIN_LaTeX
    \(f =
      \begin{cases}
      t & 1\\
      f & 2\\
      \end{cases}
    \)
#+END_LaTeX

the itemize environment in which it occurs ends before the inline math.

> Marko Schütz Schmuck writes:
> 
> > Dear All,
> >
> > the new exporter does not seem to handle \begin/\end inside \( ... \).
> >
> > If the org file contains
> >
> >     \(f =
> >       \begin{cases}
> >       t & 1\\
> >       f & 2\\
> >       \end{cases}
> >     \)
> >
> > the resulting tex file contains
> >
> > $\backslash$(f =
> > \begin{cases}
> > t & 1\\
> > f & 2\\
> > \end{cases}
> > $\backslash$)
> >
> > Is there a known fix or workaround?
> >
> > Thanks and best regards,
> >
> > Marko
> 
> --
> Professor John Kitchin
> Doherty Hall A207F
> Department of Chemical Engineering
> Carnegie Mellon University
> Pittsburgh, PA 15213
> 412-268-7803
> @johnkitchin
> http://kitchingroup.cheme.cmu.edu