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[tex] \frac{ x^{- \frac{1}{2} } }{1+ ( \sqrt{x}+1) ^{2}(1- \sqrt{x} ) ^{-2} } :( \frac{1}{2 \sqrt[4]{x}(1- \sqrt[4]{x}) }- \frac{1}{2 \sqrt[4]{x}(1+ \sqrt[4]{x}) } ) ^{-2} - \frac{1}{2 \sqrt{x} -2 x \sqrt{x} } [/tex]
[tex] \frac{ x^{- \frac{1}{2} } }{1+ ( \sqrt{x}+1) ^{2}(1- \sqrt{x} ) ^{-2} } :( \frac{1}{2 \sqrt[4]{x}(1- \sqrt[4]{x}) }- \frac{1}{2 \sqrt[4]{x}(1+ \sqrt[4]{x}) } ) ^{-2} - \frac{1}{2 \sqrt{x} -2 x \sqrt{x} } [/tex]
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