X 2y 2z 2 July 8, 2019 16 32 64 128 X 2y 2z 2 xy yz zx X 2y 2z 2 4y 4 X 2y 2z 2 0 Xyz x 2y 2z 2 X 2y 2z 3 2 Y 2p x 2q x 2y 2z 2
