remove dublicate punctuation marks and keep punctuation if stay near a word( abc, , ,) last , ,

Match at least one upper case, lower case and digit between 1 and 20 length with no special characters

Removes formatting chars from string like \n, \r, \t and etc

Telefone com DDD entre parenteces ou sem com e sem traço ou sem DDD

A regex to parse regexs

If string contains special chars no match. Blank space is safe. It will accept blank spaces.