$\frac{n^2x^n}{10^n}$
$3x-2<x$
$\frac{a^2-1}{a+1}$
$5x-4y=-8$
$x^2-17x+60=0$
$\sec\left(x\right)=-\frac{4\sqrt{7}}{7}$
$\left(b+2\right)\left(b-1\right)$
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