$x^2=5$
$\frac{x-7}{x+3}+3\ge0$
$-32+15-45+81+34-15-45-81-34$
$x^4+x^2-3x^3$
$\left(3x^2-2x+7\right)-\left(2x^2+x-1\right)$
$ufjf$
$\left(x^5+4\right)\left(x^5-4\right)$
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