$16m^4-81$
$3x^2+2+x^2+x-1$
$\left(x^2-1\right)\left(x^2-7\right)$
$4-x<x+10$
$x^2-4>6$
$\lim_{x\to0}\left(\ln\left(x^x\right)\right)$
$\left[25+3\cdot\left(5\cdot3\right)\right]\cdot\left[\frac{\left(6+8\right)}{\left(\frac{6}{3}\right)}\right]$
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