$\left(\frac{2}{z-1}\right)+\left(\frac{2}{5}\right)=\frac{4}{z-1}$

$dy=\left(x-4xy\right)dx$

$g\left(x\right)\:=\:7\sin\left(x\right)-3\cos\left(x\right)-\left(\frac{\pi}{\sqrt[3]{x}}\right)^2$

$\lim_{x\to0}\left(\frac{cos4x-1}{x^2}\right)$

$\frac{dy}{dx}\left(x^3+2y^3=4\right)$

$g=\frac{k}{x}+\frac{x}{t}$

$\lim_{x\to\infty}\frac{3x^2-4x^7+2}{2x^3-4x^4+2}$