5m Zen
2 7 4x
2 7 4x pictures 5
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2 7 4x
3x 2 7 4x
x 2 7 4x
sec 2 7 4x dx
3 x 2 )- 7 4x
sec 2 7 4x
2 7 4x )u003d- 66
2 7 4x 5
2 7 4x 18 )u003d 12
2 7 4x 3 )u003d- 131
2 7 4x
