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  1. or download this
    use warnings;
    use strict;
    ...
    
    print "Equals to: &add /n"
    
  2. or download this
    
    Scalar found where operator expected at temp.pl line 7, near "$add $fi
    +rst_number"
    ...
    Global symbol "$sixth_number" requires explicit package name at temp.p
    +l line 7.
    Execution of temp.pl aborted due to compilation errors.
    
  3. or download this
    Scalar found where operator expected at temp.pl line 7, near "$add $fi
    +rst_number"
    
  4. or download this
    Global symbol "something" requires explicit package name at
    
  5. or download this
    print "Equals to: &add /n"
    
  6. or download this
    use strict;
    use warnings;
    ...
    
    print "The sum of input numbers equals to: $sum \n";