$2a^2+5a+28$
$-2^2-8-2+1$
$2a^2-3a-44$
$\frac{\left(2a^{-1}b^2\right)^2}{\left(a^{-3}b\right)^3}$
$\left(2x+15\right)\left(x+1\right)$
$\int e^{3-x}dx$
$\lim_{x\to2}\left(\frac{6x^{-3}-\frac{3}{4}}{x-2}\right)$
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