If you save your Word document as a .RTF document and you import that file into InDesign keeping local formatting in text and tables, you’ll see that all (or at least most) of the equations get imported quite nice. The only downside of this workaround is that somehow all the equations (they are imported as EPS images into InDesign) are surrounded by a 1 pt black line. When you try to edit the eps file Illustrator messes up the equation so that’s not an option.
If anyone knows how to get rid off the black line (preferably within the eps files) please let me know!