Type Alias MathEquationArrayRow

The row's equation number, such as "(1)", which Word 2016 and later put at the right margin. Word 2013 and older, LibreOffice and Pages show it after a #.

The row's parts. Word lines up the points between them with the same points in the other rows, as LaTeX's & does: the first, third and every other point line up (such as at an =), and the space goes at the others, as between the columns of align. A part can be empty, such as the first part of a row that goes on from the row before.