Answer:
[tex]x^7y^2+x^5z^3+y^3z^4+xyz[/tex]
Step-by-step explanation:
It is required that the algebraic expression has exactly 3 different variables
Since it must have a degree of 7, the highest power in the expression will be 7.
Therefore, an example of such an algebraic expression will be:
[tex]x^7y^2+x^5z^3+y^3z^4+xyz[/tex]