$3x^2-3x+7$
$\frac{dy}{dx}=3xlny$
$9x^2-9x+2=0$
$62+49-1$
$2+\tan^2x+\sec^2x=2$
$\sqrt{x+3^6}$
$2x+3^2-2x-3^2+3x-4^2-8x^2-16$
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