html editor WYSIWYG- math-Tinymce

I'm looking for someone to build me a WYSIWYG editor (WhatYouSeeIsWhatYouGet Editor) in javascript that looks like Mathquill plugin but which is not since mathquill because it is very hard to modify or to add functionnalities. If the elancer is able to modify it, that would be the best idea but it seems like no one is able, so i guess we better start from scratch. I want an html editor with the same responsiveness that mathquill has. The interface renders LaTeX math as semantically rich HTML and presents it as human-readable math by styling with CSS. Mathjax should be also used to show latex in a way that it is understandable and editable within the RTE (rich text editor). Mathjax is a plugin which allows to show math equation in vectors so that it doesn't pixelate when zooming in. It is not an image but it is like html text. The first part consists of the idea to have someone who knows about latex code and javascript and UI design (user interface which is appealing to the eye). When we are pressing a button for exemple in the RTE (fraction "a/b" button for instance), it should copy the latex code needed in the editor tinyMCE and show it live in the editor. We already have succeeded that with tinymce and mathquill but we can't add anything easily in mathquill....that is what a lot of developpers told us but we think it is possible to do it The second part of the logic consists of showing the latex code in an editable way so that when we place the cursor in the box, it should make it editable right in the box (see video for example). The formulas showing should be in mathjax SVG format because it seems to be the most stable, So the first approach is to try to use mathquill and modify it and add symbols....it seems easy to say at first, but all freelancers told me it was hard to do (but with the budget, everything is possible). The advantage is that mathquill already has the zoom in box to edit formulas live so it makes it easier for someone to start with a basis...the problem is that if we lose all of our time trying to modify something to make it work, sometimes we loose more time than to do it from scratch. Then, if mathquill is not possible to modify, we must do it like mathquill but from scratch in javascript with all the formulas and symbols i show in video (looks like word document equation editor) Here are some links: [login to view URL] [login to view URL] [login to view URL] In attached file, you will find a video in which i was explaining to a elancer what i wanted....you will be able to see mathquill in action with tinymce and mathjax showing in css-html style. You will then need to analyse documentation on github concerning mathquill because there is not a lot of documentation which makes it harder to work on it....thats why we must start from scratch i think. Then you will be able to install what is demonstrated in video in attached file...just to try mathquill and see the kind of UI i want and functionnality. We will give more details when finding a person who think he can do it. Only dedicated elancer please et experience in tinyMCE and javascript. EXPERIENCED ONLY. Good rating only (4.5 or more out of 5 and with at least 70 ratings). Dedidacted on that. Will give bonus of 500$ if delievered quickly and correctly without bugs. JAVASCRIPT expert