?repeats the group contents below at most once:
\(?optionally matches the literal ( (4010 / 508 / 2816)
\d{3}a digit, repeated exactly 3 times
\)?optionally matches the literal ) (4110 / 518 / 2916)
?matches at most one character from the set below:
\sany whitespace character
-the literal - (4510 / 558 / 2D16)