$-\frac{99}{-3}$
$\left(3x-\frac{1}{9}\right)\left(3x+\frac{1}{9}\right)$
$2x^3-3x^2+4x-6$
$\int\frac{x}{x^2+3}\:dx$
$9ax2^3+3a^3x^3$
$-3\left(4-8\right)^2$
$\left(3\sqrt{5}-2\sqrt{7}\:x\right)\left(3\sqrt{5}+2\sqrt{7}\:x\right)$
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