^start of line
\+the literal + (4310 / 538 / 2B16)
Group 1(\d{3}|\d{2}|\d{1}) \d{3}a digit, repeated exactly 3 times
\d{2}a digit, repeated exactly 2 times
\d{1}a digit, repeated exactly 1 time
\sany whitespace character
\(the literal ( (4010 / 508 / 2816)
Group 2(\d{3}|\d{2}|\d{1}) \d{3}a digit, repeated exactly 3 times
\d{2}a digit, repeated exactly 2 times
\d{1}a digit, repeated exactly 1 time
\)the literal ) (4110 / 518 / 2916)
\sany whitespace character
Group 3(\d{3}|\d{2}|\d{1}) \d{3}a digit, repeated exactly 3 times
\d{2}a digit, repeated exactly 2 times
\d{1}a digit, repeated exactly 1 time
\-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
\d{1}a digit, repeated exactly 1 time
\-the literal - (4510 / 558 / 2D16)
\d{2}a digit, repeated exactly 2 times
\d{1}a digit, repeated exactly 1 time
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string
X modifier: eXtra. A \ followed by a letter with no special meaning causes an error