$25x^4-25y^4$
$01x^2+182x+91$
$z^3-i=0$
$3y-7<-14$
$\left(-4\right).\left(+1\right).\left(+5\right).\left(-8\right)$
$2x-7\le-18x-1$
$9+8+7x+14x$
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