Verified answer

If this is the problem:

(√(3x))³ and 5√(3y³) - √(12y)

(√(3x))³ =

√(3x)•√(3x)•√(3x) =

√(3•3•3•x•x•x) =

3x√(3x)

5√(3y³) - √(12y) =

5√(3•y•y•y) - √(2•2•3•y) =

5y√(3•y) - 2√(3•y) =

(5y - 2)√(3y)

I hope this helps!