\(\rm \frac{1+x^2}{1-x}\div\frac{1-x^4}{x-1}\times \frac{x(1-x)}{(1+x)}\) యొక్క విలువను కనుగొనండి?

1
\(\rm \frac{-x}{1+2x^2}\)
2
\(\rm \frac{-x}{1+x}\)
3
\(\rm \frac{-x}{(1+x)^2}\)
4
\(\rm \frac{-x}{1+x^2}\)

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