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1 4 x 1 3 4x 2 3 1 2x
1 4 x 1 3 4x 2 3 1 2x pictures 5
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1 4
1 4 x 1 3 4x 2 3 1 2x
5 2 3 * 4x 1 2x 1 x )/ 3 1 3 * x 4 3
2 3 4x 1 )-( 2x 1 x 3 )u003d 1 3x 4 3
1 4 x 1 3 4x 2 3 1 2x
