$\frac{k}{\frac{5}{x}}$
$\:3\left(x+1\right)-2\left(x-1\right)-6<2x$
$\sqrt[3]{43^3}$
$\left(-7\right)\left(7\right)\left(-2\right)\left(2\right)$
$-27x^3+243x+216$
$\log x+\log\left(x-4\right)=\log45$
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