5m Zen
2x 7y 13
2x 7y 13 pictures 5
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2x 7y 13
2x 5y 13 2x 7y 23
3x 5y 13 2x 7y 81
10x 3y 13 2x 7y 9
y x 13 2x 7y 10
2x 7y 13 2x 3y 5
2x 7y 13 and 3x 6y 15
2x 7y 13 3x y 8
2x 7y 13
