Integrate the function $\frac{1}{2+\cos\left(a\right)}$ from 0 to $2\pi $

Evaluate the integral

$\int_1^2x\ln\left(x\right)dx$

Evaluate the integral

$\int_0^3\sqrt{9-x^2}dx$

Evaluate the integral

$\int_0^1xlnxdx$

Evaluate the integral

$\int_0^1x\ln\left(x\right)dx$

Evaluate the integral

$\int_0^1xln\left(x\right)dx$

Evaluate the integral

$\int_0^1\left(\ln\left(1+x\right)\right)dx$

Evaluate the integral

$\int_1^exlnx\:dx$