5m Zen
2x 2 2y 2 2z
2x 2 2y 2 2z pictures 5
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2x 2
2x 2 2y 2 2z
2x 2 4xy 2y 2 2z 2
2x^2+2y^2-x^2z+z^2z-2
2x 2 2y 2 2z 2 x y z 9
2x 2 2y 2 2z 2
2x 2 2y 2 2z 2 2xy 2yz 2zx
2x 2 2y 2 2z 2 2x 4y 1 0
2x 2 2y 2 2z 2 8x 24z 1
