$2x^2+x-3\:\cdot2x+4$
$5a+2\left(3+a\right)=20$
$\frac{512+11q+2q^2}{q}$
$\lim_{x\to\infty}\left(\frac{104x^5+8cos\left(15x\right)}{13x^5+4}\right)$
$-\sqrt{3}\cdot\left(-\sqrt{13}\right)$
$4x^2+4x-5$
$\int\frac{1}{\left(3-2x\right)^3}dx$
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