$\frac{x+1}{2-x}\ge1$

$\lim_{x\to0.001}\frac{\tan\left(0.001\right)}{\tan\left(0.001\right)}$

$-\frac{2\left(x^2-3x+9\right)}{\left(x^2-9\right)^2}=0$

$\frac{81w^8-y^6}{9w^4+y^3}$

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

$\frac{3}{4}x-x-\frac{2}{9}x$

$4x-1>2x$