$\lim_{x\to9}\left(\frac{x^2-x-72}{x-9}\right)$
$-2x^2+9x-5$
$\left(3y^4-5y^2\right)^2$
$\int\frac{x}{\sqrt{a+bx}}\:dx$
$-14n^2m^3\left(2h^2m^2-3xy-8m^4\right)$
$\lim_{x\to-1}\left(\left(\frac{2x^4+7x^3+7x+12}{x+1}\right)\right)$
$7x-8+10x+4$
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