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How do I use de Moivre's formula to evaluate (cos pi/7 + i sin pi/7) ^7 in cartesian form? How smart does one have to be, to be an engineer? When engineers work together, does one of them feel intimidated because another is smarter? Do humans have 46 chromosomes or 48 chromosomes? Where can I get quality MDMA? What is the surface area of a cylinder with holes in the side?