Simplify x−3−8x−2+2x−1+4\frac{x^{-3} - 8}{x^{-2} + 2x^{-1} + 4}x−2+2x−1+4x−3−8.
1−2xx\frac{1-2x}{x}x1−2x
1+2xx\frac{1+2x}{x}x1+2x
x−2x2\frac{x-2}{x^2}x2x−2
1−2xx3\frac{1-2x}{x^3}x31−2x