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Discover Questions

One number is one more than three times another. If their sum is decreased by three, the result is six. Find the numbers.? If Galaxies are moving wouldn't their motion be relative to a common gravitational center of the containment of the Universe? Simplify [1-sin (a)] [1 + sin (a)]? ∫ √(1-x)/(1+x)dx? Is the sum of 2 independent identically distributed Markov chains a Markov chain?