Выполни действия

1. \((x-y)\left (\dfrac{1}{x}+\dfrac{1}{y}\right ):\dfrac{x^2-y^2}{x^2y^2}=\) [ ];

2. \(\dfrac{3a^3b+3ab^3}{a^4-b^4}:\dfrac{6ab}{5a^2-5b^2}=\) [ ].