$cos2x=\frac{1}{sqrt2}$
$\lim_{x\to\infty}\left(e^{-\frac{e^{-rx}-1}{r}}\right)$
$5x-8\ge-4x$
$3^{3x}=9^{x+1}$
$\left(5i\:-\:3j\right)\:\left(7i\:+\:2j\right)$
$\int\frac{\cos t}{3+\sin t}dt$
$\left(x-6\right)\left(x^2+6x+36\right)$
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