BigInteger sumCoeffs(){
  BigInteger sum=Constants.BIGINT_ZERO;
  for (int i=0; i < coeffs.length; i++) {
    sum=sum.add(coeffs[i]);
  }
  return sum;
}

BigInteger sumCoeffs ( ) { BigInteger sum = Constants . BIGINT_ZERO ; for ( int i = 0 ; i < coeffs . length ; i ++ ) { sum = sum . add ( coeffs [ i ] ) ; } return sum ; }
returns the sum of all coefficients , i . e . evaluates the polynomial at 0 .
