1) 5x(2a-3b) + 2(2a-3b) + z(2a-3b)= 10ax - 15bx + 4a - 6b + 2az - 3bz= 10ax + 4a + 2az - 15bx - 6b - 3bz
2) 2ab^2(3x+y) + 4a(3x+y)= 6ab^2x + 2ab^2y + 12ax + 4ay= 12ax + 4ay + 6ab^2x + 2ab^2y
1) 5x(2a-3b) + 2(2a-3b) + z(2a-3b)
= 10ax - 15bx + 4a - 6b + 2az - 3bz
= 10ax + 4a + 2az - 15bx - 6b - 3bz
2) 2ab^2(3x+y) + 4a(3x+y)
= 6ab^2x + 2ab^2y + 12ax + 4ay
= 12ax + 4ay + 6ab^2x + 2ab^2y