$\frac{dy}{dx}=\frac{-y\left(2-x\right)}{x\left(1-y\right)}$

$\lim_{x\to0}\left(sen\left(2x\right)\right)^{\frac{3}{x^2}}$

$\left(6+5b^6\right)\left(6-5b^6\right)$

$\frac{d}{dx}\frac{x^6lnx}{e^x}$

$\int_1^{\infty}\left(\frac{8}{\sqrt[8]{x}}\right)dx$

$4x^2-x+2>0$

$16+40y+25y^2$