$\frac{2x+10}{x+3}\ge1$
$\left(x^2+x^{-1}\right)^n$
$\left(13-9x\right)\left(15x+10\right)$
$\left(4xyz+5\right)\left(4xyz+6\right)$
$-x^2+2x-0.95$
$x^4-10x^4\:+25$
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