$4\sqrt[2]{20}+4\sqrt[2]{20}+\sqrt[2]{80}+\sqrt[2]{80}$
$x^4+x^3-19x^2-49x-30$
$\left(2x^2x-3y\right)^2$
$\frac{dv}{dt}+cos2t=0$
$\left|3+\left(-5\right)^2\right|$
$\frac{d}{dx}z$
$60+-1$
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