$78x+6-2$
$\int x\arctan\left(x-1\right)dx$
$5-4\ln\left(x\right)=7$
$\lim_{x\to-5}\left(\frac{x^2-10x+25}{-40-3x+x^2}\right)$
$2yx^9-54xy^6$
$2ydx+\left(y^2-6y\right)dy=0$
$\frac{\left(-3\right)^{n+1}}{4^{n-1}}$
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