$\lim_{x\to0}\left(\frac{x^2+3x+3}{x}\right)$
$\left(x-32\right)\left(x+50\right)$
$5.1-1$
$36x^2+72x+36$
$\left(\left(1-x\right)\left(1+2x\right)\right)^6$
$\tan\left(x\right)\csc\left(2x\right)\cos\left(x\right)=1$
$9-5x+9y=0$
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