$\sqrt{y^2+1dx}-xydy=0$

$\lim_{x\to3}\left(\frac{x^2-2x-2}{x-3}\right)$

$\left(\frac{5}{3}x^2y-\frac{3}{4}xy2\right)$

$m^2+4m-14$

$-2+\left(6-6\right)-1\cdot3\left(3\cdot4\cdot0\cdot2-1\right)$

$\frac{12m^2-13m-25}{4m+5}$

$\lim_{x\to2}\left(\frac{x^3-2x^2+x-2}{x^2+x-6}\right)$