Integrate the function $\frac{\frac{-3}{\sqrt{4x+28-4}}}{x+3}$

Find the integral

$\int\frac{1}{\left(x^4+1\right)}dx$

Find the integral

$\int\frac{dx}{x^2+7x+6}$

Find the integral

$\int x\left(x^2-3\right)dx$

Find the integral

$\int\left(9+x^2\right)^{-2}dx$

Find the integral

$\int\left(\frac{arctan\left(2x\right)}{x}\right)dx$

$fracciones\:parciales\:\frac{X-1}{X^2-4}$

Find the integral

$\int x^3sin\left(x\right)dx$