tolong di jawab no 3 beserta caranya

³√27=3
³√64=4
³√216=6
3-4-6= -7

(3^3)^1/3 - (4^3)^1/3 - (6^3)^1/3
= (3^)3.1/3 - (4^)3'1/3 - (6^)3.1/3
= 3^1 - 4^1 - 6^1
= 3 - 4 - 6
= -7