`@Sun` 

`P= log_2 8 + log_3 27 - log_5 5^3` 

 `P = log_2 2^3 +log_3 3^3 - 3log_5 5`

`P = 3 log_2 2 + 3log_3 3 - 3`

`P = 3 +3 - 3`

`P = 3`

`Q = ln(2e) - log100`

`Q= ln2 + lne - log10^2`

`Q = ln2 + 1 - 2 log10`

`Q = ln2 + 1 -2`

`Q = ln2 -1`

`P + Q = 4+ln2 -1`

`P+Q = 3 + ln2` 

`=>A` loại

`Q - P = In2 -1 - 3`

`Q - P = ln2 - 4`

`=>B` Đúng

`=>B`