$\left(-654\right)+432$
$3x^2+12x+12$
$\frac{-2x^4-6x^3-5x^2-15}{x+3}$
$9x^2+42x-49$
$x^4-x^2y^2+\frac{y}{4}^4$
$5abc^2-12bca^2$
$12^4-9a^3b^2+3a$
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