$\frac{7x+28}{x^2+x-12}$
$3,457+12,678$
$\frac{\left(n+1\right)\cdot\:\left(-3\right)^2}{\left(2n+1\right)\cdot2^n}$
$a^2-8a-16$
$+129-\left(-52\right)$
$\frac{dy}{dx}=0.2-\frac{15}{5y+1000}$
$\sin^{-1}\left(-4.8481\right)$
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