$4+7b+9$
$1+\tan x+\sec x$
$2\sin^2x+c$
$2xu+u^2$
$\left(2-\sqrt{3}-2\right)^4$
$2x^2+6x+5+3x^2-2x-1$
$\frac{5}{2}\cdot x+\frac{5}{2}>-2\cdot x+8$
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