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2x+4y-z=0 2x+2y-3z=0 2x+y-Z=0 x+2y-3z=0
x-2y+3z+6=0 x+2y+3z+6=0 2x-y-3=0 x-2y+3z-6=0
(-x,-y,-z) (x,y,z) (0,0,0)
x+3y-2z-6=0 x+3y-2z=0 x-3y-2z-6=0 x-3y-2z=0
3x+2y+7z=0 3x-2y+7z=0 3x-2y-7z=0 x-2y+7z=0
(2,0,0) (0,0,-1) (3,-1,0) (0,1,1)
(0,0,0) (1,-1,0) (-1,1,0) (1,-2,6)
x+2y+3z+6=0 x+2y+3z-6=0 x-2y+3z+6=0 x-2y+3z-6=0
3x+2y+7z=0 3x-2y+7z=0 3x-2y-7z=0 x-2y+7z=0
2x+4y-z=0 2x+2y-3z=0 2x+y-z=0 x+2y-3z=0
3x+2y+7z=0 3x-2y+7z=0 3x-2y-7z=0 x-2y+7z=0
2x+8y+z+8=0 2x-8y+z+8=0 2x+8y-z+8=0 2x+8y+z-8=0
x+3y-2z-6=O x+3y-2z=0 x-3y-2z-6=0 x-3y-2z=0