I'll do 9 and 11 for you, and I challenge you to do the rest!
For y, we can remove the parenthesis and just multiply it all together using the Associative Property of Multiplication. Next, we can combine like terms, adding all the exponents relating to x and all the exponents relating to y, as well as multiplying all of the straight-up numbers, resulting in (2*-6*1/3)(x^(-2-5-1))(y^(-5+3+6))=-4*x^(-8)*y^(4)
For 11, we can start with the parenthesis and exponents from PEMDAS, expanding -a³ to -a^6 (we multiply exponents when making an exponent to the power of something!) and 2b to 4b². Next, we can do the same for (4a²b)^4 , resulting in our expression then being
[tex]4a^{8} b^{4} * \frac{-a^{6}}{4b^{2}}=-4a^{14}*4b^{2}[/tex]
We got 4b² by noticing that 1/b²=b^(-2) and could add 4 and -2 to get 2
