(495+37)-(212-154)=532-58=474
(х+8)-(в-9)=х+8-в+9=х-в+17
(495+37)-(212-154)=495+37-212+154
(х+8)-(b-9)=х+8-b+9
(495+37)-(212-154)=532-58=474
(х+8)-(в-9)=х+8-в+9=х-в+17
(495+37)-(212-154)=495+37-212+154
(х+8)-(b-9)=х+8-b+9