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Question Number 135375 by Bird last updated on 12/Mar/21 | ||
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$${let}\:\varphi\left({x}\right)=\frac{{arctan}\left({x}\right)}{{x}^{\mathrm{2}} +\mathrm{3}} \\ $$$${developp}\:\varphi\:{at}\:{integr}\:{serie} \\ $$ | ||