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  1. or download this
       if (my $num = /\[/.../\]/)
  2. or download this
       if (my $num = $_ =~ /\[/.../\]/)
  3. or download this
    my $regexp='\[/.../\]';
use YAPE::Regex::Explain;
my $exp = YAPE::Regex::Explain->new($regexp)->explain;
print $exp;
  4. or download this
    The regular expression:

...
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