$4x-5>-9$
$\frac{x^2}{27x^3+1}$
$\lim_{r\to-1}r^2+2$
$8-7+2+5$
$\sqrt{x}+y^2\cdot\sqrt{x}$
$\frac{10^{4}\cdot10^{6}}{10^{3}}$
$\left(14a^2-6cd\right)\left(7a^2+3cd\right)$
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