theorem Th6:
  z|^16 = z*z*z*z*z*z*z*z*z*z*z*z*z*z*z*z
  proof
A1: 16 = 15+1;
    z|^15 = z*z*z*z*z*z*z*z*z*z*z*z*z*z*z by Th5;
    hence thesis by A1,NEWTON:6;
  end;
