i just found this and try to solve.. but then since i left all of these for many years, so i cant remember some of the ways..(adsbygoogle = window.adsbygoogle || []).push({});

i will keep thinking of this because i'm not able to solve it.. and this make me suffer..

∫ x / (1 + e^{x}) dx

please help me to solve this.. :)

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# Please help me to solve this

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