Giúp e zới e cảm ơn ạ

`a) 80−[130−8(7−4)^2]`

`=80−[130−8.3^2]`

`=80−[130−8.9]`

`=80−[130−72]`

`=80−58`

`=22`
`b) 76−[26+(16−2.7)^3]`

`=76−[26+(16−14)^3]`

`=76−[26+2^3]`

`=76−[26+8]`

`=76−34`

`=42`

`c) 2^4. 5−[131−(13−4)^2]`

​`=16.5−[131−9^2]`

`=80−[131−81]`

`=80−50`

`=30`

​`d)120+[80−(20−12)^2]`

`=120+[80−8^2]`

`=120+[80−64]`

`=120+16`

`=136`