$\sqrt{441}$
$x^2+12+40$
$\sin\left(85\right)=\cos\left(4\right)$
$c=\left(\sqrt{8}+\sqrt{5}\right)\left(\sqrt{8}-\sqrt{5}\right)$
$\lim_{x\to\infty}\:1^{2n+1}$
$tan2x\:=\:\frac{2sinxcosx}{cos^2x-sin^2x}$
$\log\left(x+2\right)=2-\log\left(x\right)$
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