5 ___ \ ` \ 2/n*14\ ) cos |----| / \ 5 / /__, n = 2
Sum(cos(n*14/5)^2, (n, 2, 5))
2 2 2 2 cos (14) + cos (28/5) + cos (42/5) + cos (56/5)
cos(14)^2 + cos(28/5)^2 + cos(42/5)^2 + cos(56/5)^2
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