$92b^3-18b^3$
$\lim_{x\to0}\left(\frac{x-2}{x^2-2}\right)$
$21abc+28a^2bc-35bc$
$-500\cdot200\cdot0$
$7x+3=2x-2$
$3x^3+6x^2+9x-12$
$\left(10x+1\right)^{-\frac{1}{2}}$
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