The average of 15, 14, 18, x, 22 is 18, the average of 24, 54, 36, y, 42 is 40 and the average z, 75, 25, 20, 40 is 19, then find the value of x3 + y3 + z3 - 3xyz.

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0
2
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3
1
4
9

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