What is expand-(40(-3x^2-4))/((x^2-4)^3) ?

The solution to expand-(40(-3x^2-4))/((x^2-4)^3) is -(-120x^2-160)/(x^6-12x^4+48x^2-64)

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expand-(40(-3x^2-4))/((x^2-4)^3)

expand

- \frac{40 ( - 3 x ^{2} - 4 )}{( x ^{2} - 4 ) ^{3}}

- \frac{- 120 x ^{2} - 160}{x ^{6} - 12 x ^{4} + 48 x ^{2} - 64}

Solution steps

- \frac{40 ( - 3 x ^{2} - 4 )}{( x ^{2} - 4 ) ^{3}}

(x^{2} - 4)^{3} = x^{6} - 12 x^{4} + 48 x^{2} - 64

= - \frac{40 ( - 3 x ^{2} - 4 )}{x ^{6} - 12 x ^{4} + 48 x ^{2} - 64}

Expand

40 (- 3 x^{2} - 4) : - 120 x^{2} - 160

= - \frac{- 120 x ^{2} - 160}{x ^{6} - 12 x ^{4} + 48 x ^{2} - 64}

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

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

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

\frac{x ( 2 x ^{3} + y )}{6 y ^{2}}

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

What is expand-(40(-3x^2-4))/((x^2-4)^3) ?
The solution to expand-(40(-3x^2-4))/((x^2-4)^3) is -(-120x^2-160)/(x^6-12x^4+48x^2-64)