I'm not sure how to go about doing these problems.

1. y = sin( ( 3/x^3) - (2/x^2) + (1/x) )

do i distribute sin to all the fraction and then differentite or do i use the quotient rule inside the bracket and sin x = cos x???

2. cuberoot(cos(3x)

still not sure how to go about it. if i use the chain rule i have 3 function and my teacher only explained using 2 functions... how it still work?

thank you so much for any help