$2\log x-\log\left(x+6\right)=3\log\left(2\right)$
$\left(7x^4-6x^2+3\right)\:x\:\left(2x+x^3\right)$
$\int xe^{-2}dx$
$\frac{dy}{dx}-y=-\frac{xy^3}{2}$
$x^2-4x=18$
$\frac{\left(x-2\right)^n}{n\left(n-1\right)}$
$\left(f-c\right)^2$
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