$1-5x<-8$
$2x^3-18x^3+54x^2-54x$
$-4x^2-7x^2$
$\frac{-620}{-62}$
$-\frac{126.85698}{12\left(64\right)}$
$48xz^4\:-\:22xz^4$
$x'+3x=13$
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