give the 2 the understood exponent 1



Remove the parentheses on top by multiplying every inner
exponent by the outer exponent:






Rewrite  as 



Move the  from the
top to the bottom by changing the sign of the
negative exponent to positive.



Now move the  from the bottom
to the top by changing the sign of the
negative exponent to positive




Add the exponents of the x's on top and add the
exponents of the y's on the bottom



Edwin