$\lim_{x\to\infty}\left(\frac{sin\left(\sqrt{x}-3\right)}{x-9}\right)$
$\left(x^2+a^2\right)\left(x^2-a\right)$
$\frac{1}{2}m^2-n^2\:^3$
$5\cdot\left(x-2\right)<2+4x$
$\left(a+bd\right)^2$
$4x^2+3y^2+5y^2+x^2-3y^2$
$\frac{1}{cosx+1}+\:\frac{1}{cosx-1}$
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