^start of line
itemthe literal text item (case sensitive) \d+a digit, repeated at least once
\s+any whitespace character, repeated at least once
\d+a digit, repeated at least once
Non-Capturing Group(?:-|\s+minus) -the literal - (4510 / 558 / 2D16)
\s+any whitespace character, repeated at least once
minusthe literal text minus (case sensitive) \s*any whitespace character, repeated any number of times
\d+a digit, repeated at least once
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