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  1. or download this
    (?!regex1)(?!regex2)(?!regex3)
  2. or download this
    my $andedRegexes = Regexp::Assemble->new;
  $andedRegexes->add( 'regex1' );
...
  $andedRegexes->add( 'regex3' );
#regex is now 'regex(1|2|3)'
#which is more efficient
  3. or download this
    $negatedAndedRegexes = (?=qr($andedRegexes))