Document.OMathBreakBin Property (Word)
Returns or sets a WdOMathBreakBin constant that represents where Microsoft Word places binary operators when equations span two or more lines. Read/write.
When the equation breaks on a binary operator—for example, an addition, subtraction, or multiplication operator—there are three different placements of the operator: before the break, after the break, and repeated both before and after the break.
When this property is set to wdOMathBreakBinRepeat, use the OMathBreakSub property to specify how Word treats subtraction operators that appear before a line break.