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m in (-oo:+oo)
m^3 = 343/512 // - 343/512
m^3-(343/512) = 0
m^3-343/512 = 0
1*m^3 = 343/512 // : 1
m^3 = 343/512
m^3 = 343/512 // ^ 1/3
m = 7/8
m = 7/8
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