uraikan soal2 berikut dan sederhanakan : a, 8x(y-z)+2y(7×+z) b, (3a-b)(b-3a)+b^2 c, -3(w-7[x-8(3-z)]) bntuin ya kkak,,plis

a)
8x(y - z) + 2y(7x + z)
= 8xy - 8xz + 14xy + 2yz
= 8xy + 14xy - 8xz + 2yz
= 22xy - 8xz + 2yz

b)
(3a - b)(b - 3a) + b²
= 3ab - 9a² - b² + 3ab + b²
= -9a² + 3ab + 3ab - b² + b²
= -9a² + 6ab

c)-3(w - 7[x - 8(3 - z)])
= -3(w - 7[x - 24 + 8z])
= -3(w - 7x + 168 - 56z)
= -3w + 21x - 504 + 168z
= -3w + 21x + 168z - 504