`***color{green}{vioedu}`
`***color{red}{txn-0523}`

$a,2. 6^2. 3. 6^4: 6^5$

`=2.3.6^2.6^4:6^5`

`=6.6^{2+4-5}`

`=6.6^1`

`=6.6`

`=36`

_________________________

`b,8.2^5.16:2^11`

`=2^3.2^5.2^4:2^11`

`=2^{3+5+4-11}`

`=2^1`

`=2`

_________________________

`c,(4^4.16):(4^3.4)`

`=(4^4 . 4^4):(4^3 . 4^1)`

`=(4^{4+4}):(4^{3+1})`

`=4^8 : 4^4`

`=4^{8-4}`

`=4^4`

`=16`

_________________________

`d,5.125.25:5^6`

`=5^1 . 5^3 . 5^2 : 5^6`

`=5^{1+3+2-6}`

`=5^0`

`=1`

`\text{Chúc bạn học tốt}`