oo ____ \ ` \ 2 4 \ 6*n - n + n ) ---------------- / 6 2 / 9*n - n + 12*n /___, n = 1
Sum((6*n^2 - n^4 + n)/(9*n - n^6 + 12*n^2), (n, 1, oo))
oo ____ \ ` \ 4 2 \ n - n + 6*n ) ------------------ / 6 2 / - n + 9*n + 12*n /___, n = 1
Sum((n - n^4 + 6*n^2)/(-n^6 + 9*n + 12*n^2), (n, 1, oo))