$\lim_{x\to1}\left(\frac{e^x-\left(1-x\right)}{x}\right)$

$y^2+xy+y'=0$

$9>-2-x$

$x^2-\left(x+1\right)^2$

$\lim_{x\to0}\left(\frac{3\tan\left(x\right)-3x}{x\tan\left(x\right)}\right)$

$\frac{\left(6v^2\right)^{-1}w^{-4}}{\left(2v\right)^{-3}w^{10}}$

$10+\left(120-21\cdot3+10\right)\cdot2+3-\left[6\cdot9-\left(80-18\cdot4\right)\cdot4\right]+18+2$