$no\:one\:ask$
$16x^2-17x+81$
$5+2\ln\left(a+9\right)$
$3^2+3^{-2}$
$\lim_{x\to-2}\left(\frac{\left|x+2\right|}{x+2}\right)$
$-6b+2+8$
$-1+4+-6+3$
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