$\left(1-\frac{1}{n}\right)^n$
$4x^2\left(2x-5\right)+8x^2\left(2x-5\right)$
$\left(2-2x^4\right)^3$
$8.31-5.134$
$\left(x-5\right)^2+2x^2+1\ge0$
$x^2+\frac{4x}{3}+\frac{4}{3}$
$-\frac{56}{14}$
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