if you are able, please simplify and include steps.

Answer:
4x-4y
Step-by-step explanation:
1. simplify radical
[tex](2\sqrt{x} +\sqrt{4y} )(2\sqrt{x}-2\sqrt{y} )[/tex]
[tex](2\sqrt{x} +2\sqrt{y} )(2\sqrt{x}-2\sqrt{y} )[/tex]
2. using (a-b)(a+b)=[tex]a^{2} -b^{2}[/tex] simplify product