$2\le\frac{x+2}{x+1}$
$x^4+6x^2y+9y^2$
$3xy\cdot15xy$
$625x^{12}-81y^85-2y^2$
$\left(2xy+z\right)^2$
$x^{10}-x^8+x^4-x^6$
$p^2\:+\:16p+64=\:-43$
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