J0

36 144x 144x2

24 84x 72x2

16 48x 36x2

-36 144x 144x2 -24 84x 72x2 36 144x 144x2

12 60x 72x2 8 36x 36x2 -12 60x 72x2 4 24x 36x2

dx or or

0 0

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