$x^4-8x^3-x$
$9y^2+3-4x-2y^3-3x-5$
$f\left(x\right)=-7x^2-3^2$
$93\cdot84$
$\left(6x^5y-5x^4z\right)^2$
$\frac{1}{5}\sqrt[3]{5w}-\frac{1}{2}\sqrt[3]{5w}-\frac{3}{4}\sqrt[3]{5w}-\frac{1}{20}\sqrt[3]{5w}$
$\frac{2-5x}{2}\ge x-1$
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