5m Zen
X^2+y^2u003d5 x^2+y^2 6x 2y+5u003d0
X^2+y^2u003d5 x^2+y^2 6x 2y+5u003d0 pictures 5
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X^2+y^2u003d5 x^2+y^2 6x 2y+5u003d0
X^2+y^2u003d5 x^2+y^2 6x 2y+5u003d0
