tolong bantuin yg a dan d

Ijinkan saya mencoba menjawab,

No. 3a :
--> (∛5²)³
= (5⅔)³
= 5²
= 25

No. 3d :
--> 81¼ - 125⅓ + 4½
= (3⁴)¼ - (5³)⅓ + (2²)½
= 3 - 5 + 2
= -2 + 2
= 0