\da digit
{1,10}repeats the group contents below between 1 and 10 times:
\sany whitespace character
*repeats the group contents below any number of times:
.any character (except for line terminators)
\s{1,}any whitespace character, repeated at least once
\$the literal $ (3610 / 448 / 2416)
\da digit
\.the literal . (4610 / 568 / 2E16)
{2}matches exactly 2 characters from the set below:
0-9one character from 0 (4810) to 9 (5710)
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