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

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

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

expand

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

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

Solution steps

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

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

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

(a + ib)^{4}

(5 x - x^{3})^{2} 8 + x^{2}

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

\frac{4}{( 2 y + 1 ) ^{2}}

6 a^{\frac{7}{4}} \cdot (a^{\frac{7}{4}} + a^{\frac{3}{4}})

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