$4-2f>f-5$
$- 2 x - 10 x ^ { 2 } + 3 ( 5 x ^ { 2 } - 3 x )$
$\frac{p}{4}+\frac{9}{4}$
$\frac{8}{x+4}+1\ge9$
$\left(by^2\right)\left(by^2\right)$
$\frac{d^2}{dx^2}\left(4x^2+7\right)^4$
$\left(5a-2y\right)^2$
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