(Solved): 31) u = 2x + y = Z, v = x + y + z, w = x + y + 2z; (x + y 2)(z x + y)( ...

31) u = 2x + y = Z, v = ?x + y + z, w = ?x + y + 2z; ? ? ? (²x + y ? 2)(z ? x + y)(2z ? x + y) dx dy dz, - R - 10, where R is the parallelepiped bounded by the planes 2x + y ? z = 5, 2x + y ? z = 7, -x + y + z = 7, ?x + y + z = -x + y + 2z = 5, -x + y + 2z = 7