Find the integral $\int\frac{x^2}{\sqrt{x^2+6}}dx$

Compute the integral

$\int\frac{x}{\sqrt{x^2+9}}dx$

Compute the integral

$\int\frac{dx}{x^2\sqrt{4-x^2}}$

Compute the integral

$\int\frac{1}{\sqrt{x^2-36}}dx$

Find the derivative

$\frac{d}{dx}\left(4\cos\left(3x\right)-3\sin\left(4x\right)\right)$

Compute the integral

$\int\frac{1}{\sqrt{1-x^2}}dx$

Compute the integral

$\int\frac{x}{\sqrt{16-x^2}}dx$

Find the derivative

$\frac{d}{dx}\left(2x-1\cdot 4\cdot \ln\left(x+2\right)\right)$