reserve a,b,i,k,m,n for Nat;
reserve s,z for non zero Nat;
reserve r for Real;
reserve c for Complex;
reserve e1,e2,e3,e4,e5 for ExtReal;

theorem Th10:
  9|^10+1 = (3486*100+78)*10000+4402 :: 3 486 784 402
  proof
    thus 9|^10+1 = 9*9*9*9*9*9*9*9*9*9+1 by NUMBER02:6
    .= (3486*100+78)*10000+4402;
  end;
