You can put this solution on YOUR website! (6x to the negative 8 exponent/7y to the negative 2 exponent) to the negative 2 exponent.
-------------
[(6x^-8)/(7y^-2)]^-2
-----
= [6y^2/7x^8]^-2
----
= [7x^8/6y^2]^2
------
= [49x^16/36y^4]
============================
Cheers,
Stan H.