When numbering is allowed you can label each row individually. For example in the case of an article in A4 format of size 10 points. But it definitely helps a lot in bringing an official touch to the documents.
L a T e X allows two writing modes for mathematical expressions.
The inline mode and the display mode. The label command should be added after the counter number for the section has been generated. See Sections and chapters. Open an example in Overleaf.