$\left(i^3+6\right)^2$
$9x+9>9x+5$
$\left(1+x+\sqrt{x}\right)^2$
$7x^2-3x+1-4x^2+6x-3$
$\frac{d^2}{dx^2}\left(xye^x=4\right)$
$\sec x+\cot x=\frac{\tan x+\cos x}{\sin x}$
$5x^2-12x+6$
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