Parse MathType OLE Object In Word's OpenXML Using C#

I have some 10,000 pages in Word 2007 that contain MathType OLE Equations along with other descriptive text.

1. I need to parse the complete document and extract the text along with the equations into a text file as Text + MathML.

2. And Also into Text + TeX.

I believe the gentleman Mr. Bob Mathews of Design Science team has suggested of having a code to do just that on "Stack Overflow".

If it is possible then please share the C# code to do so.

Thanks