- #1

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I have this derivation, and I am not sure how to derive it:

[tex]\frac{d}{dp(x)}\int_{-\infty}^{\infty}p(x)\,log(p(x))\,dx[/tex]

I mean, what to do with the integral?

Another thing, how to integrate:

[tex]\int_{-\infty}^{\infty}e^{x^2}\,dx[/tex]

Thanks in advance