5m Zen
D 2 4d 4y x 2
D 2 4d 4y x 2 pictures 5
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D 2 4d
D 2 4d 4y x 2
d^2-4d+4y x2 e x cos2x
d^2-4d+4yu003dx 2 sinx^2 x 3
d 2 4d 4y x 2
