What is expand-(2x)/((x^2-1)^2) ?

The solution to expand-(2x)/((x^2-1)^2) is -(2x)/(x^4-2x^2+1)

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expand-(2x)/((x^2-1)^2)

expand

- \frac{2 x}{( x ^{2} - 1 ) ^{2}}

- \frac{2 x}{x ^{4} - 2 x ^{2} + 1}

Solution steps

- \frac{2 x}{( x ^{2} - 1 ) ^{2}}

(x^{2} - 1)^{2} = x^{4} - 2 x^{2} + 1

= - \frac{2 x}{x ^{4} - 2 x ^{2} + 1}

(1 - cos (x)) (1 + sec (x)) cos (x)

3 e^{2 (1 + iπ)}

3 - 7 x^{4} + δ (x - 2)

(4 - 2 x)^{2}

(1 + 2)^{12}

What is expand-(2x)/((x^2-1)^2) ?
The solution to expand-(2x)/((x^2-1)^2) is -(2x)/(x^4-2x^2+1)