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(x/sqrt(2)-y/sqrt(2))(x/sqrt(2)+y/sqrt(2)) - 2(x/sqrt(2)+y/sqrt(2)) - 4(x/sqrt(2)-y/sqrt(2)) = 0
(x/sqrt(2)-y/sqrt(2))(x/sqrt(2)+y/sqrt(2)) - 2(x/sqrt(2)+y/sqrt(2)) - 4(x/sqrt(2)-y/sqrt(2)) = 0
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