TinyMCE4 has no math formula  plugin default. This plugin is a formula plugin called “Tinymce4  Formula Editor”, you can use it in your tinymce editor to insert math formula easily.

Features:

1. Support for multiple formula: Fraction, Script, Radical, Intergral, Operator, Bracket and Function.
2. Support for special characters, such as greek letters, arrows, relations and scripts.
   
3. Responsile for complicated formula.
4. Easy to use as the MathType.
5. Pure front-end, no server support.
6. Save as image.
   

Installation

1. Upload the files to the tinymce plugins’ folder.
2. Update your tinymce configuration to add `leaui_formula` plugin, eg:

tinymce.init({
        selector: "textarea",
        plugins: [
        "leaui_formula",
                "advlist autolink link lists charmap  hr anchor pagebreak",
                "directionality textcolor paste fullpage textcolor" 
        ],
        paste_data_images: true,
        toolbar1: "leaui_formula | styleselect formatselect fontselect fontsizeselect | bold italic underline strikethrough " 
}); 

Please Note that, you must set paste_data_images to true.

Updates

• v2. 16/02/2016 fix not support for latest Chrome