Tolong dijawab no. 2,6,9,13!!please pake cara

Tolong dijawab no. 2,6,9,13!!please pake cara

2.
$18q times( - 4p {}^{2} q) = - 72p {}^{2}q {}^{2}$
6.
$- 12mx {}^{3}y {}^{2} times 20m {}^{3}xy {}^{3} \ = - 24 {m}^{4}x {}^{4}y {}^{5}$
9.
$( - 5p {}^{2} times 6p) + ( - 5p times ( - 3q)) \ = - 30p {}^{3} + 15pq$
13
a. 2(5x+1) + 2(3x) = 10x + 2 + 6x = 10x + 6x + 2 = 16x + 2

b. 4x + 1 + 2y + 4 + 2x + 3y = 4x + 2x + 2y + 3y + 1 + 4 = 6x + 5y + 5