5m Zen
X x2 2y
X x2 2y pictures 5
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X x2
X x2 2y
x2 x 2y )( x 3y
x2 xy y2 x 2y
x2 y2 x 2y
2x 2y x2 x x2
x 2y 2 x2 4y2
x 2y x2 4y2
dy x x2 2y dx
x x2 2y
x x2 2y 3x2 x 3y
x x2 2y 3x2 x 2y
