A_K3_2 := (M^(-2))*(1*M^2) + (L^1)*(-1 + 2*M^2 + 2*M^4 - 1*M^8 + 1*M^10) + (L^2*M^2)*(1*M^2 - 1*M^4 + 2*M^8 + 2*M^10 - 1*M^12) + (L^3*M^4)*(1*M^10);