Created attachment 121968 [details]
MSWord2010.docx

When I import a docx document with small formulas (1-liner), which are included in the text lines, the alignment or the padding aren't optimal. So the spaces between the neighbor text lines differs.
A better solution is to keep the surrounding padding of formulas (1-liner) very small, so that it fit completely in a text line height without introduction of new space pixel to the upper and lower neighbor text line.
And a second thing: The 1 liner formulas should on the same baseline of a text line as the text. In the current situation the formulas seems too high positioned over the baseline.

As attachment is a MS Word 2010 docx document (3.Formula.IncorrectAlignment.MSWord2010.docx) with an example document. To show the differences between MS Word 2010 and LibreOffice 5.1.02rc there is the attachment "3.Formula.IncorrectAlignment.png" (left side: MS Word 2010; right side: LibreOffice 5.1.0.2rc).

And see how great the page is rendered with MS Word and how bad the LibreOffice output is.