What is expand-(x^2-y^2)/((x^2+y^2)^2) ?

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

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expand-(x^2-y^2)/((x^2+y^2)^2)

expand

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

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

Solution steps

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

(x^{2} + y^{2})^{2} = x^{4} + 2 x^{2} y^{2} + y^{4}

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

(e^{x} + c)^{2}

(a + b) e^{3}

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

5 x (- 8 + 10) + x (- 410 + 5)

(e^{- t} - 4 e^{\frac{1}{2}}) (\frac{1}{8} - \frac{1}{8} e^{- 2 t})

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