\(the literal ( (4010 / 508 / 2816)
\d{3}a digit, repeated exactly 3 times
\)the literal ) (4110 / 518 / 2916)
\s*any whitespace character, repeated any number of times
\d{3}a digit, repeated exactly 3 times
?matches at most one character from the set below:
\sany whitespace character
.the literal . (4610 / 568 / 2E16)
-the literal - (4510 / 558 / 2D16)
\d{4}a digit, repeated exactly 4 times
\ban ASCII word boundary