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"We all know Linux is great...it does infinite loops in 5 seconds."

--Linus Torvalds (about the superiority of Linux)

--Linus Torvalds (about the superiority of Linux)

$$\cos x = \sum\limits_{n = 0}^\infty {\frac{{\left( { - 1} \right)^n x^{2n} }}{{\left( {2n} \right)!}}}$$