reserve n for Nat,
  k for Integer;

theorem Th15:
  for x being object, p,q being FinSequence holds (<*x*> ^ p ^ q).1 = x
proof
  let x be object, p,q be FinSequence;
  <*x*> ^ p ^ q = <*x*> ^ (p ^ q) by FINSEQ_1:32;
  hence thesis by FINSEQ_1:41;
end;
