có ai ko giúp mình với ạ

`a)33 + 36 + 67 +64`

`= (33+67 ) + ( 36 + 64 )`

`= 100 + 100`

`= 200`

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`b)18.49+18.51-200`

`= 18 . ( 49+51 ) - 200`

`= 18 . 100-200`

`= 1800 -200`

`=1600`

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`c) (5^2022 + 5^2021 ) : 5^2021`

`= 5^2022 : 5^2021 + 5^2021 : 5^2021`

`= 5^1 + 5^0`

`= 5 +1`

`=6`

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`d) 2.[(7-3^3 : 3^2 ) :2^2 + 99 ] - 100 . 2021^0`

`=2.[(7-3^1 ) :2^2 + 99 ] - 100 .1`

`= 2.[(7-3 ) :2^2 + 99 ] - 100 .1`

`= 2.[4 :2^2 + 99 ] - 100 .1`

`= 2.[4 : 4 + 99 ] - 100 .1`

`= 2.[1 + 99 ] - 100 .1`

`=2.100 - 100 .1`

`= 200 - 100`

`= 100`

`=> (   ) -> [  ] -> {   }`