Answer
You need to install lots of additional software to get the LaTeX extension to show up, and to work. As far as I’ve been able to ascertain, it only works with old versions of Inkscape, and all the sites which show instructions seem to be old and out-dated.
Anyhoo, that’s probably not what you want to hear, but there is a work around to get LaTex generated graphics into Inkscape.
Use this site: http://www.tlhiv.org/ltxpreview/ to enter your LaTeX code, and click the “popup” button, then right click the image in the popup and save the page as an SVG on your desktop. Then you can click and drag it into an Inkscape document. Less than ideal I suppose, but it works.
Attribution
Source : Link , Question Author : sash , Answer Author : Billy Kerr