Any way to draw textbook notation to GROB?

[xset]

Hi

I didn't find any traces of TEXTOUT analogue to draw expression like sqrt(sin(x)/x) in natural (not algebraic) notation (and would be cool to start editor in any place). This is programmable MATH computer, is not it ? It should be able to draw mathematical expressions over plots, etc.

Many thanks in advance!!!
XSet

P.S.
Of course i can try to write my own version since now i can parse math expressions with part() function (thanks to Didier Lachieze).