$\frac{-1^3-1}{-1^2}$
$3x+6m+180=180$
$9a^2-16$
$-2+-5+8+-3+-2u+-8$
$1+\cos x+\cos2x=0$
$\left(6x^2+1\right)\left(6x^2+6\right)$
$20m^5-15m^3+5m$
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