$3\left(4k+20k^2+25k^3\right)$
$x^2\le5x-6$
$\left(5x-22\right)\left(5x-20\right)$
$\left(-22\right)-\left(-66\right)$
$\left(\frac{8ab}{7}-\frac{3b^2}{7}\right)^2$
$\left(\frac{4}{x}\right)\left(x^4\right)$
$\frac{1}{27}\left(27y^3+1\right)$
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