5m Zen
3x^2 2xy+2y^2 2x+y 1u003d0
3x^2 2xy+2y^2 2x+y 1u003d0 pictures 5
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3x^2 2xy+2y^2 2x+y 1u003d0
3x^2 2xy+2y^2 2x+y 1u003d0
