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n in (-oo:+oo)
1/2 = (n/31)/8 // - (n/31)/8
1/2-((n/31)/8) = 0
(-1/248)*n+1/2 = 0
1/2-1/248*n = 0 // - 1/2
-1/248*n = -1/2 // : -1/248
n = -1/2/(-1/248)
n = 124
n = 124
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