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Good Day, We know these facts: The equation below must be proved:
Consider we have Thus ,
we have
^{yz} = (b^y)^z (c^z)^y = (ca)^z (ab)^y = a^{z+y} b^y c^z = a^{z+y} (ca)(ab) = a^{2+z+y} bc = a^{x+y+z+2} )