5m Zen
9 x2 1
9 x2 1 pictures 5
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9 x2 1
x2 25 y2 9 1
2x x2 9 1 x 2
5x x 1 x2 9
x2 4 y2 9 1
x2 16 y2 9 1
tan 9 x2 1
x3 u2212 9 x2 1
(- 4x2 9 x2 1
9 x2 1 x dx 6
9 x2 1
