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How to solve the following expression algebraically: (x+y)^-2 = x^-2(1+y/x)^-2 Thanks.? Lecture noes on concept paper? How to solve the following expression algebraically: (x+y)^-2 = x^-2(1+y/x)^-2 Thanks ahead? What's something that every single thing on earth has in common? Match the following equations with their direction field?