$\left(x+\sqrt[2]{x^2+1}\right)^4$
$2x^2-24x-90$
$4y-3x-y+x$
$\left(6x^2+12x+6\right)$
$4a^3b-2a^2b^2-1.11ab^3$
$9u^2-30uy+25y^2$
$42x^2+30y^2-10=0$
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