28(29-23) - 29(28-23)
= 812-644-812+667
= 23
(-167).(67-34)-67.(34-167)
= -11189+5678-2278+11189
= 3400
28(29-23) - 29(28-23)
= 812-644-812+667
= 23
(-167).(67-34)-67.(34-167)
= -11189+5678-2278+11189
= 3400
28(29-23) - 29(28-23)
= 812-644-812+667
= 23
(-167).(67-34)-67.(34-167)
= -11189+5678-2278+11189
= 3400
đây nha
tick cho mk nha