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m in (-oo:+oo)
m/2 = m+1/8 // - m+1/8
m/2-m-(1/8) = 0
m/2-m-1/8 = 0
-1/2*m-1/8 = 0 // + 1/8
-1/2*m = 1/8 // : -1/2
m = 1/8/(-1/2)
m = -1/4
m = -1/4
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