$2a^2b+2a^2-3b-3$
$\lim_{x\to\infty}\left(\frac{\sqrt{4x^2+1\:}}{x^2}\right)$
$\frac{125a^3-27b^3}{5a-9b}$
$-322\:-\:2$
$\log\left(5x^2+5x-8\right)=2$
$\frac{1x^3+1x^2+1x^1+1}{x^2-2}$
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