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$\lim_{x\to-4}\left(\frac{x^4+2x^3-3x^2}{x^3-x^2}\right)$
$\int10^zdx$
$\frac{980}{140}$
$-\left(2b-3a\right)\left(a-b\right)$
$x+1\le97$
$\frac{x^3-6x+9}{x+3}$
$36-60x+25^2$
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