$-4+6-2\left(-9-10\right)+5$
$4x\:+\:20x^2$
$y=\sqrt{x+2}\sqrt[3]{x^2-x}\sqrt{x+1}$
$3a^2+ab$
$\left(\frac{1}{2}x^3+y\right)^3$
$-9x^2-6x-5$
$3xy^8z^9+6x^3y^4z^5$
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