$6+11x<5$
$9k^2-6k+1$
$3x-1;\:x=-2$
$\left(1+\frac{3}{5}\right)^{-\frac{1}{3}}$
$\left(5-7\sqrt[2]{2}\right)\cdot\left(5+7\sqrt{2}\right)$
$8^2.8^{-3}$
$33,3\infty\:x\:40$
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