This editor helps to create Strict Content MathML 3.0 expressions.
You can define custom mathematical/physical symbols for later use in the formula. To use a custom symbol, just enter its (case-sensitive) name in the editor.
You may use an underscore to separate the main symbol from a subscript. Such symbols are inserted by entering their name without underscore in the editor.
Example: With a custom symbol U_max, you can type Umax in the editor and get Umax instead of Umax.
This Strict Content MathML Editor is based on Guppy which is licensed under the MIT License.