$nvauyv$
$2y^3+y-3y^2-4\cdot\:2y+5$
$x^2-40x+351$
$n^2-7n+12$
$2x^2+6x+20=0$
$2^2-2\cdot2\cdot5+5^2$
$f\left(x\right)=\left(x^3-2x+1\right)\left(2x^2+3x\right)$
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