For #1:

To be precise, this is not a polynomial. Polynomial have monomials added together arranged in descending degrees for their variables. This is called a rational expression. What you should do to simplify it, is to just cancel the powers of similar variables
on the top and bottom. Factor the numbers top and bottom out to prime numbers and then you can cancel any numbers that are the same. Each power of any variable that is the same, can cancel out exactly one of the powers of that variable on the other side of
the faction bar. In effect the variable with the smaller power can subtract that power from the larger one.

So we have:

35 times x to the 9th power times y to the 10th power

OVER

5 times x to the 8th power times y to the 3rd power.

State 35 as 5 times 7. Bring the bottom powers up and subtract them from the top powers:

5 times 7 times x to the (9 - 8) times y to the (10 - 3)

OVER

5

Cancel the 5s on the top and the bottom and clean everything up we get:

7xy^7

In words: 7 times x times y to the 7th power.

Sorry. I can't read your one and two questions. Please try to write them out in English, as I have done above.