5m Zen
Y u003d x 2 6x u2013 4y u003d u201310
Y u003d x 2 6x u2013 4y u003d u201310 pictures 5
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Y u003d x 2 6x u2013 4y u003d u201310
Y u003d x 2 6x u2013 4y u003d u201310
