public class Poly implements Cloneable {
   // as given before, plus

   public boolean equals (Poly q) {
      if (q == null || deg != q.deg) return false;
      for (int i = 0; i <= deg; i++)
         if (trms[i] != q.trms[i]) return false;
      return true; }

   public boolean equals (Object z){
      if (!(z instanceof Poly)) return false;
      return equals((Poly) z); }
}