Organize the following polynomial expressions from least to greatest based on their degree:

x + 2xyz

9x3y2

18x2 + 5ab - 6y

4x4 + 3x2 - x - 4

x+2xyz=x+2 x1 y1 z1 has degree 1+1+1=3

9 x3 y2 has degree 3+2=5

182 + 5 a1 b1 - 6 y - 1

that's - 6y^1 but I think the one is negative

18 x2 + 5ab-6y has degree 2

x y2 + x2 y2 + 2xy

x y2 is 1+2=3 th degree of x2 y2 is 2+2=4 and the degree of 2xy is 1+1=2