$\left(-2x+4\right)^2\left(-2x-4\right)$
$4x^3y-y$
$1^2-12x+1$
$\lim_{x\to\infty}\left(\frac{6x^{2}-7}{5x^{3}-4}\right)$
$24\cdot90$
$\frac{x^6+3x^4+3x^2}{x^2+1}$
$5-2\cdot4$
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