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2 7x 2
2 7x 2 pictures 5
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2 7x 2
2 7x 2 4
2 7x 2 6
2 7x 2 3
2 7x )( 2 6x
2 7x 2 5x 6
2 7x 2 3 10
2 7x 2 )u003d 10
2 7x 2 2 7
2 7x 2 0
2 7x )( 2 7x )u003d
