$\frac{2x^4+3x^3-x+1}{x-3}$
$2x^2+14x+24\le0$
$\left(-8r\right)\left(-2r\right)$
$\frac{4x^3}{2x^2}$
$\int\sin\left(x\right)^53dx$
$\frac{\sec\left(x\right)}{\sqrt{1-\cos^{2}\left(x\right)}}$
$\left(x-9\right)\left(x+12\right)$
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