i am really confused about how to do these problems. i look at the examples but am still confused. any help would be graetly appreciated

1) AFCE base 16

- FAD2 base 16

2) BAD base 16

x BAD base 16

3) 4341 base 5

x 3412 base 5

4) 1101 1001 0100

- 1010 1011 1010