hello!
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Plug in the values of the variables & simplify:-
![\longrightarrow\pmb{4x^2y^2}](https://img.qammunity.org/2023/formulas/mathematics/high-school/2l2enoq0m1pjxvnmzyqzj11brz3myc75i3.png)
The values of the variables are:-
![\bigstar{\boxed{x=2~and~y=-2}](https://img.qammunity.org/2023/formulas/mathematics/high-school/9nbib1mt1o5zqhnki8td2phb6gtgieoh2j.png)
Simplify:-
![\longrightarrow\pmb{4(2)^2(-2)^2}](https://img.qammunity.org/2023/formulas/mathematics/high-school/y2jsqdprtp4wnnxi8a6b8bg7j7h1rsvkri.png)
![\longrightarrow\pmb{4*4-4}](https://img.qammunity.org/2023/formulas/mathematics/high-school/3rmslmi12kwqwdbubo2au9v6fqxkjmbelb.png)
![\longrightarrow\pmb{16-4}](https://img.qammunity.org/2023/formulas/mathematics/high-school/b49wrmis9slkgeffhj3yqnau5o6w3dtu90.png)
![\longrightarrow\pmb{12}](https://img.qammunity.org/2023/formulas/mathematics/high-school/w19xvfb9h9kfg0d0jh4peabj1xyahu89rb.png)
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note:-
Hope everything is clear; if you need any clarification/explanation, kindly let me know, and I'll comment and/or edit my answer :)