How to convert word document with mathml content to HTML

Question

My objective is to convert word document to HTML and if equation presents in a document, then it must be converted into mathml before saving it as HTML.

So I converted all the equation into mathml using mathtype. Now, word document will have mathml content too.

If I save it as "web page filtered" document, I get it as HTML but mathml tags are getting converted to entity.

For example:

sample.docx

<mrow>&#456;</mrow>

is converted to

<mrow> &C456;</mrow>

EXPECTATION

I need to convert this document into HTML but if mathml contents present, then that mathml content alone shouldn't be converted into HTML. What would be the solution for this?

I need something like, XML file <![CDATA[ unparsed char ]]> . In word file, how can I shield mathml content not to be converted?