\d+a digit, repeated at least once
:the literal : (5810 / 728 / 3A16)
\d+a digit, repeated at least once
Non-Capturing Group(?:(?!\d+:\d)[\s\S])* *repeats the group contents below any number of times:
Negative Lookahead(?!\d+:\d) \d+a digit, repeated at least once
:the literal : (5810 / 728 / 3A16)
\da digit
\sany whitespace character
\Sany non-whitespace character
g modifier: global. Finds all matches instead of stopping after the first