Question

X + y whole cube + y + Z whole cube + Z + X whole cube minus 3(X+Y)(Y+Z)(Z+X)

Answer 1

(X + y)3 + (y + Z)3 +( Z + X)3 - 3((X+Y)(Y+Z)(Z+X)) = 2(x3+ y3+ z3 - 3xyz)

Answer 2

Answer:

2y(3x^2+y^2+3z^2+3xy-3yz-3zx)