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b in (-oo:+oo)
b/8 = 8/16 // - 8/16
b/8-(8/16) = 0
b/8-1/2 = 0
1/8*b-1/2 = 0 // + 1/2
1/8*b = 1/2 // : 1/8
b = 1/2/1/8
b = 4
b = 4
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