$\int\frac{cos^3\left(2x\right)}{sen^5\left(2x\right)}dx$

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

$2x^3-2x^2-4x+16$

$-500:\left(-25\right)$

$cos^2\left(\frac{\pi}{7}\right)-sin^2\left(\frac{\pi}{7}\right)$

$\frac{d}{dx}x^3y^3=3$

$x^2+8x+24$