Please help me! Not too hard but i am confused!

Step-by-step explanation:

simplify

Apply radical rule :

Apply radical rule :

Step-by-step explanation:

First, we'll start by simplifying .  2 factors of 125 are 5 and 25, and since 25 is a perfect square, that can be taken out of the radicand and added to the 2 that's already outside of it, creating .

x to the power of 4 can be simplified to x squared and taken out of the radicand along with that 7, so:

y to the power of 7 is a bit trickier to solve, so I left it like this, because I think it's the simplest version, but if this isn't an option then simplify further by working on the y.  

I hope this helps :)