$x2-3x-55$
$\frac{4}{x-1}+x=7$
$\lim_{x\to0}\left(\frac{2-\sqrt[2]{x+2}}{x-2}\right)$
$\left(25-36x^4\right)\left(5-6x^2\right)$
$\int\left(12x\:ln\:7x\right)dx$
$\frac{-12a^3b^4c^5}{3a^2b^4}$
$9t^2\:+24\:t\:16$
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