What is expand-(-s^2+a^2)/((s^2+a^2)^2) ?

The solution to expand-(-s^2+a^2)/((s^2+a^2)^2) is -(-s^2+a^2)/(s^4+2a^2s^2+a^4)

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expand-(-s^2+a^2)/((s^2+a^2)^2)

expand

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

- \frac{- s ^{2} + a ^{2}}{s ^{4} + 2 a ^{2} s ^{2} + a ^{4}}

Solution steps

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

(s^{2} + a^{2})^{2} = s^{4} + 2 a^{2} s^{2} + a^{4}

= - \frac{- s ^{2} + a ^{2}}{s ^{4} + 2 a ^{2} s ^{2} + a ^{4}}

(cos (x) + tan (x)) (π)

(x - 11)^{2}

\frac{8 x + 10}{( s + 1 ) ( s + 2 ) ^{3}}

\frac{( x + 1 ) ( x + 2 ) ( 2 x + 3 )}{6}

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

What is expand-(-s^2+a^2)/((s^2+a^2)^2) ?
The solution to expand-(-s^2+a^2)/((s^2+a^2)^2) is -(-s^2+a^2)/(s^4+2a^2s^2+a^4)