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m in (-oo:+oo)
6 = (m^7)/8 // - (m^7)/8
6-((m^7)/8) = 0
-1/8*m^7 = -6 // : -1/8
m^7 = 48
m^7 = 48 // ^ 1/7
m = 48^(1/7)
m = 48^(1/7)
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