$-9\cos\left(x\right)+54\cos\left(x\right)^2-3$
$x-4<-1$
$4xy-12x$
$2x-\sqrt{x}+\frac{1}{x}$
$\left(\frac{1}{6}x^3+\frac{3}{7}y^3\right)\left(\frac{1}{6}x^3-\frac{3}{7}y^3\right)$
$\frac{m}{2}=87$
$g\left(x\right)=\left(x^2+1\right)^2\left(x-1\right)^5x^3$
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