Find the nth term of the following sequences

Question 1:

4,16,36,64,100
4n2

Question 2:

2,8,18,32,50
2n2

Question 3:

5,8,13,20,29
n2+4

Question 4:

-8,-2,8,22,40
2n210

Question 5:

0,9,26,51,84
4n23n1

Question 6:

-8,0,14,34,60
3n2n10