-3(4x+5)

A.7x+15
B.7x-15
C.-12x-15
D.-12x+15

5k^2(-6k-2k+6)

A.-30k^3+3k^2+30k
B.30k^4-10k^3+11k^2
C.-k^4+3k^3+11k^2
D.30k^4-10k^3+30k^2

My answers are b and a please help me

on the second one, I think you mistyped.