Assinale a alternativa que apresenta o valor de \( x - y \), sendo que:

\( x=(\dfrac{1}{3})^{-2}+(\dfrac{1}{2})^{-2} \) e \( y=\dfrac{2.(\dfrac{1}{5})^{-1}-2^2}{(\dfrac{1}{4})^{-2}} \)