1: git clone https://github.com/quyen1708/strapi-custom-field-math-type.git
2: Open repository
2: "cd src/plugins/wysiwyg"
3: run "npm install"
4: "cd ../../.." (You will in strapi-custom-field-math-type)
5: "npm install or yarn"
6: run: "npm run develop --watch-admin" or "yarn develop --watch-admin"
7: Create new content-type and new field.
8: Field "Rich text" now will be custom CKEditor with math type and chem type.
