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m in (-oo:+oo)
(1/4)*m = m^39 // - m^39
(1/4)*m-m^39 = 0
1/4*m-m^39 = 0
m*(1/4-m^38) = 0
-1*m^38 = -1/4 // : -1
m^38 = 1/4
m^38 = 1/4 // ^ 1/38
abs(m) = (1/4)^(1/38)
m = (1/4)^(1/38) or m = -(1/4)^(1/38)
m = 0
m = 0
m in { (1/4)^(1/38), -(1/4)^(1/38), 0 }
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