It is mentioned in READ FIRST. Example:
Evaluate TexForm with the expression as argument
TeXForm[\[Omega] == \[Pi] Floor[N[\[Omega]/\[Pi]]] // HoldForm]
(* \omega =\pi \left\lfloor N\left[\frac{\omega }{\pi }\right]\right\rfloor *)
Copy the output and paste it in the editor, bracketed between $
$\omega =\pi \left\lfloor N\left[\frac{\omega }{\pi }\right]\right\rfloor$
