$\frac{x^3+1}{x+1}>0$
$-x-\left(13+4x\right)=-3\left(5-9x\right)+2$
$\left(3a^3-4b^5-c^4\right)^3$
$\frac{x^3-2x^2+6x-2}{x^2-x}$
$x-5\cdot x+5$
$4x^2\left(x^4+1\right)^2$
$4y\left(\frac{1}{2}\right)$
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