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X3 x2 2x 1 0
X3 x2 2x 1 0 pictures 5
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X3 x2
X3 x2 2x 1 0
x2 1 )( x3 2x )( x2 64 0
x2 2x 1 0 then x3 1 x3
x3 x2 2x 1 0
