(565+398-166)+267-(544+356-495)
(565+398-166)+267-(544+356-495)=659 1. 565+398-166=797 2. 797+267=1064 3. 544+356-495=405 4. 1064-405=659
(565+398-166)+267-(544+356-495)=659. 1)565+398=963. 2)963-166=797. 3)544+356=900. 4)900-495=405. 5)797+267=1064. 6)1064-405=659.