$\sqrt{2}\:.\:5\sqrt{2}$
$\tan\left(-2\right)=0$
$x^2+8x+27$
$19n\:-\:10n\:+\:6n\:-\:4n$
$\left(3x^2-2xy^2\right)^2$
$2\left(4x\right)\left(\frac{y}{6}\right)$
$\frac{6x-4}{x}$
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