$\lim_{x\to0}\left(\frac{\sqrt{\left(\left(x+h\right)^2-2\left(x+h\right)+5\right)}-\sqrt{\left(x^2-2x+5\right)}}{h}\right)$

$\frac{dx}{dy}+x=y$

$\left(-\frac{1}{3}\right)-\frac{3}{5}\cdot\:\sqrt[4]{-3^3}$

$4\left(x+4\right)=3\left(x-3\right)\left(x-2\right)$

$5k\:-3k\:-\:6d\:+2d$

$\frac{\left(2\sqrt{x^5}\cdot\left(3\right)-20\sqrt{x^3}\cdot\left(5\right)+50\sqrt{x}\cdot\left(15\right)\right)}{15}$

$\frac{d}{dx}\:xy=y+1$