PLz help with these questions.

For questions 1 and 2 , write each expression using a single exponent.

1)   x^9/x^2

2) h^14/h^5

For questions 3 and 4, simplify each expression.

3) 4^4/4^6

4) 5^0

For questions 6-8, multiply the following polynomial.

6) -2r( 8r + 5 )

7) 4a( a^2 + 7a + 4 )

8) ( 2y - 3 )( 3y - 2 )