$\frac{4x^2+15x-21}{x+5}$
$8x^{12}+27z^{18}$
$\lim_{u\to0}\left(\frac{sin\:u}{\sqrt{u}}\right)$
$2t^2-4t+1$
$\int_{-a}^a\left(a^2-x^2\right)^{\frac{1}{2}}dx$
$\frac{dy}{dx}=110x^3-67x^2-41x$
$2-\left|0-1\right|$
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