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N in (-oo:+oo)
7 = ((N-4)^1)/3 // - ((N-4)^1)/3
7-(((N-4)^1)/3) = 0
7-((N-4)/3) = 0
(-1*(N-4))/3+7 = 0
(-1*(N-4))/3+(3*7)/3 = 0
3*7-1*(N-4) = 0
25-N = 0
(25-N)/3 = 0
(25-N)/3 = 0 // * 3
25-N = 0
25-N = 0 // - 25
-N = -25 // * -1
N = 25
N = 25
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