$\left(5x-2\right)-\left(-4x-9\right)$
$\left(+19\right).\left(-8\right)$
$x-x^2-x^3$
$\lim_{x\to\infty}\left(\left(\sqrt{4x^2-5x+7}-\sqrt{4x^2+7x-13}\right)\right)$
$6>\frac{3x}{28}$
$\frac{x^5-5x^3+4}{x+1}$
$\left(5\:x\:^2\:-2y\:^5\right)^3$
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