@Bơ
a.`(123-37) -123`
`=123-37-123`
`=123-123-37`
`=-37`
b.`126-(126-33)`
`=126-126+33`
`=33`
c.
` (-224) -(34-224) `
`=-224-34+224`
`=-224+224-34`
`-34`
d.
` (-53-23) -(567-23) `
`=-53-23-567+23`
`=-23+23-53-567`
`=0-620`
`=-620`
e.`12. (-5) .(-2) .(-6) `
`=12.(-60)`
`=-720`
f.
`23×(-27) -23×73`
`=621-1679`
`=-2300`
g.
` (43×13) × (-3) +27×(-14-16)`
`=43.13.(-3)+27.-30`
`=43.(-39)+(-810)`
`=-1677-810`
`=-2487`