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2x 1 2 9x 4
2x 1 2 9x 4 pictures 5
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2x 1 2 9x 4
factoriser 4 1 2x 2 9x 2
2x 2 1 x 4 9x 2 20
9x 4 x 2 2x 1
2x 1 2 9x 4
