$cos2x-cosx-cos\left(x-1\right)$
$1x+1y=32$
$x^2y+3y-4=9$
$2u+3>7$
$\frac{dy}{dx}=\frac{-xy+y^2}{x^2+3xy}$
$\int\left(9x^5-4\right)^2\:x^4dx$
$\lim_{x\to\infty}\left(ln\left(8x\right)-ln\left(x+5\right)\right)$
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