Calcular la integral $2\int\frac{1}{e^{\left(c^2\right)}}dc$

Calcular la integral

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

Calcular la integral

$\int x^n\cdot\cos\left(x\right)dx$

Calcular la integral

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

Calcular la integral

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

Calcular la integral

$\int\cos\left(x\right)\div xdx$

Calcular la integral

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

Calcular la integral

$\int\sin\left(x\right)\div xdx$