$x\cdot\frac{dy}{dx}=y+1$
$\frac{9n^4-12v^8}{3n^2-12v^2}$
$n^2+14n+37=0$
$\lim_{x\to6}\left(\frac{\sin\left(2x-8\right)}{x-6}\right)$
$a+2a+5b+a-2b$
$\left(cd^2\right)^{11}$
$1+2+3+1+2+3$
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