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7x 1 2 4 1 2x 2
7x 1 2 4 1 2x 2 pictures 5
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7x 1 2 4 1 2x 2
2 7x 1 1 2x 2 7 u003d- 21 4
7x 2 (- 2x 4 )+ 3 x 1 )+ 2 1
7x 1 2 4 1 2x 2
