This is some text $math \frac12$ other text
Other node \[ displaymath \frac{1}{2} \] blah $$ \int_2^3 $$
and some more text \(and math\) blah. And $math with a
\$ sign$.
Stuff in a $pre tag$
An AMS environment without $$…$$ delimiters.
\begin{equation}\begin{split} a &=b+c\\ &=e+f \end{split} \end{equation}