$n^2+10n+25$
$\lim_{x\to0}\left(1+\frac{3}{x^2}\right)^x$
$\frac{dy}{dx}+5y\left(x\right)=2x+1$
$2=\frac{3x+1}{x-2}$
$a^4-a^2b^4+\frac{b^8}{4}$
$0^7$
$-9x^2+54x+113$
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