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w^2 + 2 x^2 + 2 x y + 2 y^2 + z^2, x=10-4a-6b,y=8-3a-3b,z=2-a-3b,w=-6+2a
w^2 + 2 x^2 + 2 x y + 2 y^2 + z^2, x=10-4a-6b,y=8-3a-3b,z=2-a-3b,w=-6+2a
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