What is (d^2)/(dx^2)(2/(1+x^2)) ?

The answer to (d^2)/(dx^2)(2/(1+x^2)) is -(4(-3x^2+1))/((1+x^2)^3)

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(d^2)/(dx^2)(2/(1+x^2))

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

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

Solution steps

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

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

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

\frac{d}{d x} (- \frac{4 x}{( 1 + x ^{2} ) ^{2}}) = - \frac{4 ( - 3 x ^{2} + 1 )}{( 1 + x ^{2} ) ^{3}}

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

\frac{d}{d x} (- x + 1)

\int π^{x} - x^{- 1} d x

\int_{7}^{14} - 30 x^{2} + 340 x d x

x \to i lim (\frac{x ^{4} - 1}{x - i})

\frac{d y}{d x} + cos (x) = (y + sin (x))^{2}

What is (d^2)/(dx^2)(2/(1+x^2)) ?
The answer to (d^2)/(dx^2)(2/(1+x^2)) is -(4(-3x^2+1))/((1+x^2)^3)