What is expand (1-x^2)/((x^2+1)^3) ?

The solution to expand (1-x^2)/((x^2+1)^3) is (1-x^2)/(x^6+3x^4+3x^2+1)

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expand (1-x^2)/((x^2+1)^3)

expand

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

\frac{1 - x ^{2}}{x ^{6} + 3 x ^{4} + 3 x ^{2} + 1}

Solution steps

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

(x^{2} + 1)^{3} = x^{6} + 3 x^{4} + 3 x^{2} + 1

= \frac{1 - x ^{2}}{x ^{6} + 3 x ^{4} + 3 x ^{2} + 1}

(x^{3} - 2 x - 1)^{5}

2 x + 5 y^{2}

g (- 3 = 3 (- 3)^{2} - 2 (- 3) + 2)

(3 t + 1) (1, e^{t}, t ln (t))

y d x - (2 x + 3 y) d y

What is expand (1-x^2)/((x^2+1)^3) ?
The solution to expand (1-x^2)/((x^2+1)^3) is (1-x^2)/(x^6+3x^4+3x^2+1)