$18ab^3-9a^2b-2ab^2+b^3$
$\frac{9x^3-19x^2-28x+12}{x-3}$
$5x^3-x+4$
$64^4-x^2$
$\frac{2x^2+x-5x^4-6x^3+2}{x+2}$
$\lim_{x\to0}\left(\frac{e^{4x}-1}{sin\left(2x\right)}\right)$
$5x+10=2y-3$
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