УПРОСТИТЬ 1 ПРИМЕРДАМ 30 БАЛЛОВ

Решите задачу:

$1)\frac{(\sqrt{x})^{3}+(\sqrt{y})^{3}}{\sqrt{x} +\sqrt{y} }-\sqrt{xy} =\frac{(\sqrt{x}+\sqrt{y})((\sqrt{x})^{2}-\sqrt{xy}+(\sqrt{y})^{2}}{\sqrt{x}+\sqrt{y}} -\sqrt{xy}=x-\sqrt{xy}+y-\sqrt{xy}=x-2\sqrt{xy} +y=(\sqrt{x}-\sqrt{y})^{2}\\\\2) (\sqrt{x}-\sqrt{y})^{2}*\frac{\sqrt{x}+\sqrt{y}}{x-y} =\frac{(\sqrt{x}-\sqrt{y})(x-y)}{x-y}=\sqrt{x}-\sqrt{y}$