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  1. or download this
    my $equation = '979x + 87y - 8723z = 274320';
    
    ...
    my @parts = ($equation =~ /(.*?)([xyz])/ig);
    
    print "$_\n" for @parts;
    
  2. or download this
    979
    x
    ...
    y
     - 8723
    z