Which expression is equivalent to x−2−4x−1−2\frac{x^{-2} - 4}{x^{-1} - 2}x−1−2x−2−4?
1x+2\frac{1}{x} + 2x1+2
x+2x+2x+2
x−2x-2x−2
1−2xx\frac{1-2x}{x}x1−2x