code: public static PolyEquationImpl create(final int ...args)
      {
          BigInteger[] bigints = new BigInteger[args.length];
          for (int i = 0, n = args.length; i < n; i++)
          {
              bigints[i] = BigInteger.valueOf(args[i]);
          }
          return new PolyEquationImpl(bigints);
      }
docs: Helper factory to create instances.
  Accepts 'int', converts them to BigInteger, and calls the constructor.
  
  @param args as int values
  @return instance