[lmikle]

попробуй как-то так:

Код:

procedure CreateSums(A : Array Of Integer);
var
  I, J : Integer;
  H, S : String;
begin
  Memo1.Lines.Clear;
  For I := Low(A) To High(A)-1 Do
    Begin
      H :='';
      For J := Low(A) To I Do H := H + IntToStr(A[J]) + '+';
      For J := I+1 To High(A) Do
        Begin
          S := H + IntToStr(A[J]);
          Memo1.Lines.Add(S);
        End;
    End;
end;