SS[1] := [
w*x*y+w*x+x*z+y+z,
48-48*x-8*x^2+Dx*(-6+426*x-2*x^2-64*x^3)+Dx^2*(-6*x+209*x^2+94*x^3-32*x^4)
]:

SS[2] := [
w*x*y+w*x*z+w*x+y+z,
-30-12*x-16*x^2+Dx*(3-264*x-320*x^2-128*x^3)+Dx^2*(3*x-128*x^2-224*x^3-64*x^4)
]: