$3z^2+11z-4$
$\sqrt{26^2-23^2}$
$\lim_{x\to0}\left(\frac{5-\sin\left(9x\right)}{7x}\right)$
$\tan\left(x\right)\cot\left(x\right)-\cos\left(x\right)=\sin^2\left(x\right)$
$\frac{x^2-11x+18}{x^2+2x-8}$
$2\:+\:4p\:-\:6p\:-\:3$
$\frac{dy}{dx}=\frac{y^2-xy-x^2}{xy}$
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