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Why don't we hear our own snoring?

People usually don't hear their own snoring because they are in a state of sleep and their brain doe...

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Kuorans, what are some things unique to your country?

★‎ ‎‎‎‎ ﹐ ‎ ‎ stay in the middle . . . ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎‎‎ ‎ ‎ ‎ ♡‎...

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Why is (n-1)(n+1)=n^2-1?

The basic answer is that you cross-multiply the values in each factor: (n - 1)(n + 1) n^2 - n + n -...