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n in (-oo:+oo)
n^4+2*n^2+2013/96 = 0
n^4+2*n^2+671/32 = 0
t_1 = n^2
1*t_1^2+2*t_1^1+671/32 = 0
t_1^2+2*t_1+671/32 = 0
DELTA = 2^2-(1*4*671/32)
DELTA = -639/8
DELTA < 0
n belongs to the empty set
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