60 ____ \ ` \ 2 \ 2*(x + 3) / --------------------- / (6*x + 15)*(6*x + 21) /___, n = 0
Sum((2*(x + 3)^2)/(((6*x + 15)*(6*x + 21))), (n, 0, 60))
2 122*(3 + x) --------------------- (15 + 6*x)*(21 + 6*x)
122*(3 + x)^2/((15 + 6*x)*(21 + 6*x))
x^n/n
(x-1)^n
1/2^(n!)
n^2/n!
x^n/n!
k!/(n!*(n+k)!)
csc(n)^2/n^3
1/n^2
1/n^4
1/n^6
1/n
(-1)^n
(-1)^(n + 1)/n
(n + 2)*(-1)^(n - 1)
(3*n - 1)/(-5)^n
(-1)^(n - 1)*n/(6*n - 5)
(-1)^(n + 1)/n*x^n
(3*n - 1)/(-5)^n