Question: How do I put this linear transformation in Maple? (Linear Algebra)

Hello, I have a question.

The exercise consists of defining the image in relation to a chosen base. For example, I choose {x^4,x^3*y,x^2*y^2,x*y^3,y^4} as a base. Then I want to calculate T(x^4), T(x^3*y),T(x^2*y^2),T(x*y^3),T(y^4) through maple but but maple won't calculate it.

Do you know what I'm doing wrong?
Thanks in advance


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