Derivar con la regla del producto $\frac{d}{dx}\left(x\tan\left(y\right)\right)$

Calcular la integral

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

Calcular la integral

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

Calcular la integral

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

Calcular la integral

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

Calcular la integral

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

Calcular la integral

$\int\frac{1}{\sqrt{1-5x}}dx$

Calcular la integral

$\int\frac{x^3}{\sqrt{x^2+4}}dx$