25) B

It is not possible for me to type the calculation on this blog. So I am attaching a picture of it.

Let us solve this question in portions.

(2x^³⁄₂)² = 4x³

(y³)² = y⁶

(√z)² = z

So the simplification would be:

__4x³ y⁶
__ z

25) B

It is not possible for me to type the calculation on this blog. So I am attaching a picture of it.

Let us solve this question in portions.

(2x^³⁄₂)² = 4x³

(y³)² = y⁶

(√z)² = z

So the simplification would be:

__4x³ y⁶
__ z