Choose the polynomial written in standard form. x3y2 + 4x4y + 10x9 x4y2 + 4x4y5 + 10x2 xy2 + 4x3y8 + 10x2 x4y5 + 4x3y2 + 10x2 is it the second one?

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.