$\lim_{x\to\infty}\left(x^2ln\left(1+\frac{1}{x}\right)\right)$
$\left(\frac{1}{3}\right)^{-1}\cdot3^{-2}-\left(\frac{2}{3}\right)\cdot\left(\frac{1}{2}+6\right)$
$121x^2+66x-7$
$3x-4+6x+2$
$3x^2-4\ge\:5$
$\:3\left(-2\right)\:+3\left[\:2-\left(-1\right)2\right]-2$
$f\left(x\right)=8x^2+x$
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