$\left(\frac{4x^2y^0}{8x^{-2}}\right)^{-2}.\left(\frac{x^{-2}}{x^{-4}y^5}\right)^2$

$9^x-2\left(3^{x+1}\right)=5$

$\lim_{x\to0}\left(\frac{1-\cos^22x}{4x^2}\right)$

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

$\int\left(\frac{-2}{\sqrt[4]{7x+2}}\right)\:dx$

$\left(5.1\right)^0$

$\left(\sqrt{1-x^2}\right)y'=xy$