First give the coefficient numbers 3 and 2 the exponent 1:



Now that every factor has an exponent, we remove the parentheses,
by multiplying every exponent inside the parentheses by the exponent
outside the parentheses.  [This is the distributive principle of
exponents],



Simplify:



Now use the rule for making negative exponents positive, which is

If there is a negative exponent on the TOP, move the base and
exponent to the BOTTOM and change the sign of the negative
exponent to positive.

and 

If there is a negative exponent on the BOTTOM, move the base and
exponent to the TOP and change the sign of the negative
exponent to positive.

So we move the 3-3 from the top to the bottom and put 33 on the bottom.

We move the x-12 from the top to the bottom and put x12 on the bottom.  

And we move the 2-3 from the bottom to the top and put 23 on the top.

But we leave the y9 on the bottom because it already
has a positive exponent.



We finish by raising 2 to the 3 power and getting 2∙2∙2 = 8,
and raising 3 to the 3 power and getting 3∙3∙3 = 27:



Edwin