$x^2-6x+14$

$\left(xyz^2-2x^2yz\right)$

$\lim_{x\to8}\left(\frac{8x-64}{7x^2-488}\right)$

$\left(\sqrt{a}-1\right)^2$

$\frac{\sin\left(x\right)+\tan\left(x\right)}{\sec\left(x\right)+1}$

$\left(-\frac{8}{4}\right)-\left(-\frac{15}{3}\right)$

$\frac{dy}{dx}=\frac{54}{y^{\frac{1}{4}\:+\:36x^2y^{\frac{1}{4}}}}$