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The value of \( \int e^{x}\left[\frac{x^{4}+2}{\left(1+x^{2}\right)^{5 / 2}}\right] d x \), is equal to
\( \mathrm{P}^{\mathrm{m}} \)
W
(1) \( \frac{e^{x}(x+1)}{\left(1+x^{2}\right)^{3 / 2}} \)
(2) \( \frac{e^{x}\left(1-x+x^{2}\right)}{\left(1+x^{2}\right)^{3 / 2}} \)
(3) \( \frac{e^{x}(1+x)}{\left(1+x^{2}\right)^{3 / 2}} \)
(4) None of these
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