$\frac{x+1}{x-1}+2>\:0$
$4x^2-28x+40$
$\left(3x-3\right)\left(-4a^2+2\right)$
$6+2\left(4-3x\right)$
$\frac{\left(x+1\right)\left(x-3\right)}{\left(x+2\right)\left(x-3\right)}$
$c^2+12c+36$
$0.4n+1.8n$
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