$\left(-3-2x-x^2\right)^2$
$x^210xy+xy+16y^2$
$x^3-m^3$
$\left(a^w+b^{w+1}\right)^2$
$6x^3-9nx^2y^3-3n^2x^4y^3$
$-11ab^2c\left(5ab+2bc-4ca\right)$
$\lim_{x\to\infty}\left(\frac{\ln\left(x\right)}{2x+\ln\left(x\right)}\right)$
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