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n in (-oo:+oo)
n/4 = 8/32 // - 8/32
n/4-(8/32) = 0
n/4-1/4 = 0
1/4*n-1/4 = 0 // + 1/4
1/4*n = 1/4 // : 1/4
n = 1/4/1/4
n = 1
n = 1
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