2.1.34 [W3C-HTML52] Section 4.7.17. MathML

V0129: The math element is not supported

The specification states:

 ... MathML
     The [MathML math element/math element from the MathML namespace] falls into the 
     embedded content, phrasing content, ... flow content ... categories for the purposes 
     of the content models in this specification.

EdgeHTML Mode

The math element is not supported.