t^3*(4*t^2+12*t+1)*(4*t^2-12*t+1)*D^4+2*t^2*(112*t^4-680*t^2+3)*D^3+t*(864*t^4-3424*t^2+7)*D^2+(960*t^4-2112*t^2+1)*D+32*t*(6*t^2-5)