Chemical Formulae, Mathematical Formulae... help?

Hi there.

Using InDesign, I am trying to re-format a supplied Word Document, coming from the client. 

There are lots of complex (to me anyway) formulas in the text, which disappear when imported.

I'm using a work-around ... "Printing a PDF" from the supplied document and then "placing" in a picture box in my InDesign Doc, but really, in 2019, there must be another way (which is 100 times more time efficient)?

Any help appreciated.