+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
matches the character -
literally (case sensitive)
This hyphen is treated literally, which might be confusing for others. Consider escaping it or placing at the start or end of the class!
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
_,/ matches a single character in the list _,/ (case sensitive)
\s matches any whitespace character (equivalent to [\r\n\t\f\v ])