$3x^2-4x-16$
$7x+3\left(5-4x\right)=5$
$20\log\left(144\right)$
$\left(5a^3-7a\right)^2$
$7-3n<13$
$\frac{\left(-4y\right)^3}{4y^{-8}}$
$9a^2-6ab+6ab-4b^2$
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