how to insert latex equation when asking questions in mathworks ?

If i want to insert this latex equation in my question what should I do

$$
  \nu_{1}=-R_{1}^{-1}E_{1}^{-1}R_{1}^{-1}P_{1}q_{v}$sign ($q_{0}(0)) .
$$

why are there no formatting options like Latex equation HTML URLs or helpful shortcuts ?

[dpb]

Nope...you see what there is in the icons above the entry box...