What is expand-(4(-3x^2-1))/((x^2-1)^3) ?

The solution to expand-(4(-3x^2-1))/((x^2-1)^3) is -(-12x^2-4)/(x^6-3x^4+3x^2-1)

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expand-(4(-3x^2-1))/((x^2-1)^3)

expand

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

- \frac{- 12 x ^{2} - 4}{x ^{6} - 3 x ^{4} + 3 x ^{2} - 1}

Solution steps

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

(x^{2} - 1)^{3} = x^{6} - 3 x^{4} + 3 x^{2} - 1

= - \frac{4 ( - 3 x ^{2} - 1 )}{x ^{6} - 3 x ^{4} + 3 x ^{2} - 1}

Expand

4 (- 3 x^{2} - 1) : - 12 x^{2} - 4

= - \frac{- 12 x ^{2} - 4}{x ^{6} - 3 x ^{4} + 3 x ^{2} - 1}

\frac{( 3 - x ) ^{3}}{3}

(x + 2) (x - 1 + 7) (x - 1 - 7)

(1 - \frac{x}{10})^{6}

\frac{s}{( s ^{2} + 1 ) ( s - 1 )}

(- e^{- x} sin (x) - e^{- x} cos (x))^{2}

What is expand-(4(-3x^2-1))/((x^2-1)^3) ?
The solution to expand-(4(-3x^2-1))/((x^2-1)^3) is -(-12x^2-4)/(x^6-3x^4+3x^2-1)