$\lim_{x\to\infty}\left(ln\left(2x\right)-ln\left(x+9\right)\right)$
$\int zlnzdz$
$-5a^2b-3ab^2$
$\int x^7e^{-x}dx$
$\frac{3x^6+27x^5-33x^2}{3x^2}$
$3xy^5+5xy-xy^5$
$\frac{dx}{dy}-\left(\frac{1}{2}x\right)=y\cos\left(2y\right)$
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