Expanding Brackets

Question 1:

3 m+6
3m+18

Question 2:

6 5d−4
30d−24

Question 3:

3 3e+7
9e+21

Question 4:

w 3w−10
3w2−10w

Question 5:

u 5k−9
5ku−9u

Question 6:

10i 3i−2s
30i2−20is