^start of line
\(the literal ( (4010 / 508 / 2816)
{3}matches exactly 3 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
\)the literal ) (4110 / 518 / 2916)
the literal (3210 / 408 / 2016)
{3}matches exactly 3 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
-the literal - (4510 / 558 / 2D16)
{4}matches exactly 4 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
$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