$\lim_{x\to-1}\left(30\right)$
$\left(6a^2+3b^4\right)^3$
$49u^2-28u+4u$
$20+90+514$
$\left(a^2+10b^2\right)^2$
$8m+14-124n$
$\left(x^3y^5w\right)\left(xy^{-2}w^6\right)$
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