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N in (-oo:+oo)
(N/13)^5 = -5 // + 5
(N/13)^5+5 = 0
1/371293*N^5 = -5 // : 1/371293
N^5 = -1856465
N^5 = -1856465 // ^ 1/5
N = -13*5^(1/5)
N = -13*5^(1/5)
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