$2\cdot\left(\sec\left(\frac{\pi}{8}\right)+\csc\left(\frac{\pi\:}{8}\right)\right)$
$64x^{2}+9x^{2}+18xy$
$in\left(x+y\right)$
$\frac{2x+1}{3x-6}\ge3$
$\tan\left(\arccos\left(\frac{\sqrt{3}}{2}\right)-\arcsin\left(-\frac{3}{5}\right)\right)$
$\lim_{x\to-\sqrt{5}}\left(\frac{x^2+2\sqrt{5}x-15}{x+\sqrt{5}}\right)$
$7.15\cdot10^8$
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