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9x 7y 2
9x 7y 2 pictures 5
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9x 7y 2
5x 7y 2 9x 2y
x 7y )( 2 9x
9x 8 7y 9 2
9x 2 7y 2 42
9x 2 24xy 7y 2
81x 2 9x 7y 2
7x 9y 2 9x 7y 2
9x 7y 2 0
9x 7y 2
