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Why does the body need internal systems why can't it be just a holographic projection of light? What's the first digit of Pi? There are many different types of fossils in our hypothetical rock layers. What do the majority of these fossils have in common? Find the values of p for which the series is convergent. Sigma infinite on top and n=1 on bottom. n(1+n^2)^p? How do I use de Moivre's formula to evaluate (cos pi/7 + i sin pi/7) ^7 in cartesian form?