(3 - 2)(3 + 21) = 9 + 63 - 6 - 42 = 72 - 6 - 42 = 66 - 42 = 24 (I got 24 as my final answer)
-7(3m - 4) + 2
First, expand to get rid of parentheses. / Your problem should look like:
Second, add 28 + 2. / Your problem should look like:

Answer:
-21m + 30
B is correct. Hope this helps