# Thread: Collecting integral problems

1. I still think $\int e^x dx$ is beautiful because the result of the integral is the same as the integrand.

2. I just saw this integral today

$\int_0^1\frac{\ln(1+x^2)}{1+x}\,dx.$

See its solution here. (You don't need to know spanish to understand it, the solution is readable as it is written.)

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