$=30+50\cdote^{-0,02x}$

$\frac{dy}{dx}=\frac{x^2y^2+x^2+y^2+1}{xy+y}$

$-6m+8n+5-m-m-6m-11$

$\left(x+1\right)\left(\sqrt{2-x}\right)$

$\frac{dy}{dx}\sqrt[4]{\frac{x}{3x+1}}$

$\lim_{x\to0}\left(\frac{1+sen\:x\:-\:e^x}{\left(tg\:2x\right)^2}\right)$

$\left(10y^2-\frac{1}{22}\right)^2$