\s*a Unicode whitespace character, repeated any number of times
\(?optionally matches the literal ( (4010 / 508 / 2816)
\d+a Unicode decimal digit, repeated at least once
:the literal : (5810 / 728 / 3A16)
\d+a Unicode decimal digit, repeated at least once
:the literal : (5810 / 728 / 3A16)
\d+a Unicode decimal digit, repeated at least once