Visual math editor

@karolgil

Have you checked LaTex?

https://www.linuxjournal.com/article/7870

One site I used to solving equations has an online editor:

https://www.fxsolver.com/edit/formula/

so I checked the source to see what they were using:

http://mathdox.org/formulaeditor/

It seems very old and is not updated since 2008 (according to the linked sourceforge site), but it works and is free.

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EDIT Found this one:

http://www.imatheq.com/corpsite/index.html

Seems more modern, but requires a subscription. Seems you can add to a website as long you have the correct license

@tisuchi I was also looking for a plugin from LaTeX, but I haven't found anything that would suit me.

@rodrigo.pedra Can http://mathdox.org/formulaeditor/ send data to the database freely and read from the database, so that I have formatted mathematical formulas?

http://www.imatheq.com/corpsite/index.html is a good idea, I'm just looking for something cheaper, because there the server license costs $ 19k.

As the documentation says it manipulates a <textarea> I guess so. Just add a name attribute and a standard <form> would send it without a problem.

If you are fine with user inputting LaTeX syntax directly them you have more options. Check this wikipedia comparison table for many editors:

https://en.wikipedia.org/wiki/Formula_editor

There's a column for platform (check for web) and also a column for open source. Note that not being open source does not mean it is not free, although it is likely that most non-opensource options there are paid/licensed.