$5\left(x-1\right)+3x<2x-1$
$\frac{6o}{24}$
$20a^2+9a-20$
$\left(x-6\right)\left(x+6\right)$
$\lim_{x\to2}\left(\frac{3\sqrt{x}-3}{x-27}\right)$
$6+\left(_-6\right)$
$8a\cdot7a$
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