$\lim_{x\to-2}\left(\frac{x^2-2x+6}{x^3+x^2-x+2}\right)$
$\left(4-3y\right)^3$
$4-7\cdot4-1$
$\int\frac{1}{2x\sqrt{x^2-49}}dx$
$\left(4xyz-2x\right)\left(6xyz-\left(\frac{3}{7}\right)\right)$
$2p^2+240p+3600$
$8a^3+b^3+12a^3$
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