$\lim_{x\to0.99}\left(\frac{2x^2-x-1}{x-1}\right)$
$\int\frac{e}{\sqrt{1-e^{2x}}}dx$
$\frac{dy}{dx}=-\frac{sin\left(x\right)}{y}$
$\frac{d}{dx}\frac{x^4-16}{x^3-8}$
$\left(-5x\:-\:7x\right)+\left(-6x\:-\:3x\right)$
$\left(\sqrt[2]{11}+\sqrt[2]{5}\right)\left(\sqrt[2]{11}-\sqrt[2]{5}\right)+\left(\sqrt[2]{5}+2\right)\left(\sqrt[2]{5}-2\right)$
$\left(5-3\sqrt{x}\right)^2$
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