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

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

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

expand

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

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

Solution steps

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

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

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

Expand

2 (- x^{2} - 1) : - 2 x^{2} - 2

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

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

\frac{s}{( s ^{2} + 4 ) ^{3}}

(x + 23)^{7}

(x - 9) (x + 3)

\frac{( 3 + 4 i ) ^{4}}{( 2 - i ) ^{10}}

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