$\int\frac{x+7}{4x^2-1}dx$
$\frac{125x^8y^6}{125xy^5}$
$18a^2-6a+12a^3$
$\frac{3x^3-x^2+x-2}{x^2+1}$
$\frac{12x^9\:y^{10}}{4x^7\:y^5}$
$w^2+w-42$
$\lim_{x\to1}\left(\frac{8x-8}{\ln\left(x\right)\sin\left(x\right)}\right)$
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