+repeats the group contents below at least once:
\(?optionally matches the literal ( (4010 / 508 / 2816)
+matches at least one character from the set below:
0-9one character from 0 (4810) to 9 (5710)
\)?optionally matches the literal ) (4110 / 518 / 2916)
\s?optionally matches any whitespace character