pipe regex into another regex.txt

The first regex pattern is piped into the second regex pattern or the third if it exists

MAKE SURE THE FOLLOWING REGEX PATTERNS DOES NOT CONTAIN SPACE AT THE END

###############################################    [DOES CONTAIN] AND [DOES NOT CONTAIN] CAN BE EITHER REGEX PATTERN OR A PLAIN STRING    ##############################################################


^.*(?=does contain)(?:(?!does not contain).)*$                        The first regex pattern [does contain] is piped into the second regex pattern [does not contain]


^.*(?=does contain).*(?=does contain).*$                              The first regex pattern [does contain] is piped into the second regex pattern [does contain]


^(?:(?!.*does not contain).)(?:(?!does not contain).)*$               The first regex pattern [does not contain] is piped into the second regex pattern [does not contain]                 


^(?:(?!.*does not contain).).*(?=does contain).*$                     The first regex pattern [does not contain] is piped into the second regex pattern [does contain]