5m Zen
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Xy 4y
xy 4y 5x
xy 4y 0
xy 4y 3x 12
xy 4y x4
xy u0026#39;+ 4y 8x 4
xy 4y 2x
xy 4y 2x 8
xy 4y 16 graph
xy 4y u0026#39;u003d x 4
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