$a^8+\sqrt{2a^4b^4}+\frac{b^8}{2}$
$\lim_{x\to9}\frac{9-x}{\sqrt{x-3}}$
$\sqrt{12x}$
$1.4110\cdot10^2$
$\left(+4\right)\cdot\left(-11+5-6+2\right)$
$\sqrt{a-7}=a$
$1.5-3.7t-8-1.9t$
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