Find the nth term of the following sequences

Question 1:

1,4,9,16,25
n2

Question 2:

2,8,18,32,50
2n2

Question 3:

-4,5,20,41,68
3n27

Question 4:

-1,8,23,44,71
3n24

Question 5:

7,15,27,43,63
2n2+2n+3

Question 6:

11,15,21,29,39
n2+n+9