IDK what ] [ means mathematically, but that makes sense about parentheses. I flunked calculus, but I seem to recall [ ] being different from ( ) in math.
The normal () are a lower form of group [] are seen as like a way of saying it groups more and around lower grouping (). These can be used as well{} on some occasions
This basically means 2019 in brackets has to come before indictments even though people read left to right and top to bottom math like over rides this in the concept that is their
People think kill brackets mean right away when they really mean executed first before anything else can be done in order for the equation to be correct
