^start of line
\+?optionally matches the literal + (4310 / 538 / 2B16)
1?optionally matches the literal 1 (4910 / 618 / 3116)
\W*any non-word character, repeated any number of times
{3}matches exactly 3 characters from the set below:
2-9one character from 2 (5010) to 9 (5710)
\W*any non-word character, repeated any number of times
{3}matches exactly 3 characters from the set below:
2-9one character from 2 (5010) to 9 (5710)
*matches any number of characters 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
\s*any whitespace character, repeated any number of times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string