$4n^2-16n+16$
$e^{-x}+y=\frac{1}{\sqrt{x^2+1}}+6$
$w+6=0$
$\left(-3x^2\right)\left(\sqrt{x^3}\right)$
$x^2-8x-3=0$
$\frac{2cosx-2cos^3x}{sinx}=sin2x$
$\int\left(4x^3e^{-x^4}\right)dx$
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