If you would like to choose the polynomial written in standard form, you can do this like this:
x^3y^2 + 4x^4y + 10x^9
x^4y^2 + 4x^4y^5 + 10x^2
xy^2 + 4x^3y^8 + 10x^2
x^4y^5 + 4x^3y^2 + 10x^2
Writing the polynomial in standard form means that you have to write the terms by descending degree:
x^4y^5 + 4x^3y^2 + 10x^2
The correct result would be x^4y^5 + 4x^3y^2 + 10x^2.
