$\frac{243}{9}$
$160sin2xcos2x$
$\frac{x^2+1}{2}-\frac{3x-2}{3}\le\frac{\left(x-1\right)^2}{6}$
$k^4-6k^3+19k^2-240k+850$
$\left(a^5\:-\:6\right)^2$
$\frac{dy}{dx}=\frac{1}{\sqrt{1-2x}}$
$m^2-4m-5$
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