r^5 - r^4*s^6 + 9*r^4*s^5 - 31*r^4*s^4 + 50*r^4*s^3 - 39*r^4*s^2 + 10*r^4*s - 
    3*r^4 - r^3*s^6 + 3*r^3*s^5 + 12*r^3*s^4 - 46*r^3*s^3 + 54*r^3*s^2 - 
    15*r^3*s + 3*r^3 - r^2*s^6 - 3*r^2*s^5 + 9*r^2*s^4 + r^2*s^3 - 21*r^2*s^2 + 
    6*r^2*s - r^2 + r*s^7 - 3*r*s^6 + 6*r*s^5 - 10*r*s^4 + 11*r*s^3 - s^3