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Input:
(y=x^3-x)
Write:
`(y=x^3-x)`
Compute:
$$f^{-1}(y=(-x)+{x}^{3})$$
Output:
$$f^{-1}(y=(-x)+{x}^{3})== x=(-y)+{y}^{3}$$ Result: $$x=(-y)+{y}^{3}$$
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