15 ___ \ ` \ / 2*i 2 \ / \a + i + b/ /__, i = 1
Sum(a^(2*i) + i^2 + b, (i, 1, 15))
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1240 + a + a + a + a + a + a + a + a + a + a + a + a + a + a + a + 15*b
1240 + a^2 + a^4 + a^6 + a^8 + a^10 + a^12 + a^14 + a^16 + a^18 + a^20 + a^22 + a^24 + a^26 + a^28 + a^30 + 15*b
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