How do I add a equation within word file using OMaths in VBA

I am trying to add a simple equation within the word document, which is ultimately generated from an excel spreadsheet. The spreadsheet have a command button added, which is assigned with a VBA code. After clicking the button, the word file generates a series of data fetching the values from different cells. I just want to add an equation within the word doc. Is it possible ? I found number of examples but with neither simple explanation nor fulfilling the similar condition. I am very new to VBA with occasional VBA exposure. But I am pretty sure it uses an OMaths object for getting the work done. Any help is appreciated. Is there any documentation for OMaths or any other object needed to add the equation in Word file.