I need to find the equations of the following, using Σ (and the n=1 which is at the bottom of the Σ) (and infinity is at the top of the Σ)

Question

1) 5/1 + 8/1 + 1/1 + 14/1 + . . .

2) 6/5 + 9/8 + 14/11 + 21/14 + . . .

3) -6/3 - 4/4 - 2/5 - 0 + . . .

4) 9/1 + 36/4 +27/9 + 144/16 + . . .

5) 20/4 + 25/5 + 30/6 + 35/7 +40/8 + ...