^start of line
\da digit
*matches any number of characters from the set below:
\da digit
.the literal . (4610 / 568 / 2E16)
%the literal % (3710 / 458 / 2516)
\s*any whitespace character, repeated any number of times
1STthe literal text 1ST (case sensitive) \s*any whitespace character, repeated any number of times
\$the literal $ (3610 / 448 / 2416)
\d+a digit, repeated at least once
Negated Character Class[^\n\d]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
\da digit
\da digit
*matches any number of characters from the set below:
\da digit
.the literal . (4610 / 568 / 2E16)
%the literal % (3710 / 458 / 2516)
Negated Character Class[^\n\d]* *matches any number of characters outside the set below:
\na line-feed (newline) character (ASCII 10)
\da digit
\d*a digit, repeated any number of times
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