Pls solve the question

Dear Student,

​​​​​x+y+zx-1y-1 + y-1z-1 + z-1x-1= x+y+z1xy + 1yz + 1zx=x+y+zz+x+yxyz= xyz × x+y+zx+y+z= xyz = RHSHense proved

Regards,

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