import re
   = re.sub(, new, text, count=0)  # Substitutes all occurrences with 'new'.
  = re.findall(, text)            # Returns all occurrences as strings.
  = re.split(, text, maxsplit=0)  # Use brackets in regex to include the matches.
 = re.search(, text)             # Searches for first occurrence of the pattern.
 = re.match(, text)              # Searches only at the beginning of the text.
  = re.finditer(, text)           # Returns all occurrences as match objects.