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

$\frac{3}{8}a^m\frac{-4}{5}a^{2m}b^n$

$y\:=\frac{x}{2}+\frac{1}{x}$

$-7<2x-11$

$\frac{d^3}{dx^3}\left(\frac{1}{12}+2x^2-x^3-\frac{1}{4}x^4\right)$

$\int\frac{1.}{x\sqrt{x^2+4}}dx$

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