math

(2x/5)^3 * (5/x)^3

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  1. (2x/5)^3 * (5/x)^3 = (2x/5) * (5/x) *(2x/5) * (5/x) * (2x/5) * (5/x) = 8

    x's and 5's cancel each other out.

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