$y^2-10y+50$
$4^2-20x+25$
$\int x^{20}dx$
$\log_{k^2}\left(ex\right)$
$\frac{1}{4}x^5+\frac{1}{2}x^5$
$2+7x-4-3x$
$h^2-2hj+j^2$
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