Explore Classes of Sums
Compute sums for many classes of summands, including polynomial, polynomial exponential, rational, and rational exponential.
Manipulate[With[{g = f /. n -> m}, Text@TraditionalForm@Pane[g == ReleaseHold[g], 400]], {{m, 25, "n"}, 1, 50, 1}, {{f, HoldForm[Sum[k ^ n 3 ^ k, k]], "sum"}, {HoldForm[Sum[k ^ n, k]], HoldForm[Sum[k ^ n 3 ^ k, k]], HoldForm[Sum[(1/k(k + n)), k]], HoldForm[Sum[(2^k/k(k + n)), k]]}}]