Simplify: x2+4x+4x2−4\frac{x^2 + 4x + 4}{x^2 - 4}x2−4x2+4x+4
x+2x−2\frac{x+2}{x-2}x−2x+2
x−2x+2\frac{x-2}{x+2}x+2x−2
111
x+2x+2\frac{x+2}{x+2}x+2x+2