$x^2-6x+9\ge0$
$3x+1+4x+2+x-5$
$3x^4+6y^6$
$50=15.x+5$
$\left(x^3+27\right)^3$
$\frac{x-1^3}{x+1}$
$\left(-36\right)+\left(15\right)-\left(-13\right)+\left(25\right)$
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