What is expand-(-s^2+1)/((s^2+1)^2) ?

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

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expand-(-s^2+1)/((s^2+1)^2)

expand

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

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

Solution steps

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

(s^{2} + 1)^{2} = s^{4} + 2 s^{2} + 1

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

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

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

(x + i y)^{6} + (x + i y)^{3} - 1

\frac{n ^{2 n}}{( n + 1 ) ^{2 (n + 1)}}

(x - 2 - 5) (x - 2 + 5)

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