$$\frac{xy + 2x}{(x - 2)^4} \cdot \frac{x^2 - 2x}{(y + 2)^3} = \frac{x(y + 2)}{(x - 2)^4} \cdot \frac{x(x - 2)}{(y + 2)^3} = \frac{x^2(y + 2)(x - 2)}{(x - 2)^4(y + 2)^3} = \frac{x^2}{(x - 2)^3(y + 2)^2}$$
Ответ: $$\frac{x^2}{(x - 2)^3(y + 2)^2}$$