5m Zen
X2 y2 1 3 x 2 y3 0
X2 y2 1 3 x 2 y3 0 pictures 5
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X2 y2 1
X2 y2 1 3 x 2 y3 0
x2 + y2 u22121)3u2212x 2 y3u003d0) u062Cu0648u0627u0628
x2 y2 u2212 1 3 u2212 x 2 y3 0 u0645u0639u0646u06CC
x2 y2 u2212 1 3 u2212 x 2 y3 0
