What is expand (2(7-x^2))/((7+x^2)^2) ?

The solution to expand (2(7-x^2))/((7+x^2)^2) is (14-2x^2)/(49+14x^2+x^4)

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expand (2(7-x^2))/((7+x^2)^2)

expand

\frac{2 ( 7 - x ^{2} )}{( 7 + x ^{2} ) ^{2}}

\frac{14 - 2 x ^{2}}{49 + 14 x ^{2} + x ^{4}}

Solution steps

\frac{2 ( 7 - x ^{2} )}{( 7 + x ^{2} ) ^{2}}

(7 + x^{2})^{2} = 49 + 14 x^{2} + x^{4}

= \frac{2 ( - x ^{2} + 7 )}{49 + 14 x ^{2} + x ^{4}}

Expand

2 (7 - x^{2}) : 14 - 2 x^{2}

= \frac{14 - 2 x ^{2}}{49 + 14 x ^{2} + x ^{4}}

2 (20 = 6 - 8 (x + 7))

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

\frac{1}{( k + 1 ) ln ^{2} ( k + 1 )}

(- x)^{6}

, x (2 x + 1) (x - 3)

What is expand (2(7-x^2))/((7+x^2)^2) ?
The solution to expand (2(7-x^2))/((7+x^2)^2) is (14-2x^2)/(49+14x^2+x^4)