5m Zen
X 2 2xy 4y 2
X 2 2xy 4y 2 pictures 5
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X 2
X 2 2xy 4y 2
2 2xy 4y 3 dx x 2 2 dy 0
x 2 4 2xy 4y 2
x 2 2xy 7xy 4y 2
x 2y )( x 2 2xy 4y 2 )u003d 0
x 2y )( x 2 2xy 4y 2
x 2 2xy 4y 2 2x 10y 3
x 2 2xy 4y 2 12 2 1
x 2 2xy 4y 2 12
x 2 2xy 4y 2
x 2 2xy 4y 2 6y u003d- 3
