$\int_0^{\frac{\pi}{4}}2\left(\sec\left(x\right)\right)^4dx$

$\lim_{x\to\infty}\left(\frac{2sen\left(x\right).\cos\left(x\right)}{x^2}\right)$

$\int_e^1inxdx$

$\frac{sinx^4-cosx^4}{sin^2-cos^2}=1$

$\frac{x^2\left(x-3\right)^5}{\left(x^2+2\right)^4}$

$\int\left(x\left(x+4\right)^3\right)dx$

$\frac{d}{dx}\:\sqrt{3}$