Q := 879228-1831312*r+2392983*s-10322928*t+19796052*t*r-64800*t^3*s^3-780912*r
^3-529173*r^4*s^3-879228*r^4+15917100*t^3*r^3-879228*s^4-8333280*t^3*s-\
19796052*t*r*s^4-7979052*t*r^3*s^4+7979052*t*r^3+879228*r^4*s^4+4400352*t*s^3+
10322928*t*s^4+1831312*t^4*r+64800*t^3*r^4*s^3-6073200*t^3*r^4*s^4+4569440*t^3
*r*s-5370880*t^3*r*s^3+7720640*t^3*r^3*s+8333280*t^3*r^4*s-2219680*t^3*r^3*s^3
-27734100*t^3*r*s^4-15917100*t^3*r^3*s^4+529173*t^4*r^4*s^3-879228*t^4*r^4*s^4
+685847*t^4*r*s+1910807*t^4*r*s^3+879228*t^4*s^4-685847*r*s-1910807*r*s^3+
298903*r^3*s+529173*s^3-2392983*t^4*s+780912*t^4*r^3-3868128*t*s-2392983*r^4*s
+27734100*t^3*r+10322928*t*r^4+6073200*t^3*r^4-926057*r^3*s^3-6073200*t^3-\
879228*t^4-529173*t^4*s^3-298903*t^4*r^3*s+2392983*t^4*r^4*s+926057*t^4*r^3*s^
3-1831312*t^4*r*s^4-780912*t^4*r^3*s^4+1831312*r*s^4+879228*t^4*r^4+780912*r^3
*s^4-4400352*t*r^4*s^3-10322928*t*r^4*s^4+2680672*t*r*s-7259648*t*r*s^3+
5831872*t*r^3*s+3868128*t*r^4*s-4108448*t*r^3*s^3+6073200*t^3*s^4;
B12 := -28273536+25832817*t^6*r^2-21899124*r-131126688*t+340347576*t*r+
14286159*t^2*r^2+11963520*t^5*r^2-971036*t^6*r^5+126647136*t*r^6-58842720*r^6*
t^6+102735096*r^5*t^5-41958708*r^5*t^2+18723744*t^2*r^6-117957024*r^6*t^5-\
4237920*t^2-42352128*r^3-28964196*t^6*r+53206929*r^4+1014064128*t^3*r^3-\
67535948*t^2*r+388372992*t*r^3-69290289*t^6*r^4+416594616*t^5*r-32589312*t^6*r
^3-106840576*t^2*r^3+29171313*t^2*r^4+540867072*t^5*r^3-176836608*t^3*r^2+
171635184*t^3*r^5+26488056*t*r^5+43968960*t^3*r^6+33963921*t^4*r^2-66973824*t^
4*r^6-85054012*t^4*r-9749457*r^2-117983744*t^4*r^3+73917792*t^5+44356896*t^6+
799354224*t^3*r+140082624*t*r^4+31280256*t^3*r^4-144081216*t^5*r^4-153521280*t
*r^2-92487744*t^3+52488000*t^4-30275652*t^4*r^5-77421393*t^4*r^4+42759360*r^6-\
23107084*r^5;
B13 := -1320+4267*s+11444*t-83220*t^5*s^6+23424*t^3*s^3-904*t^2+1672*s^4+38352
*t^3*s+9920*t*s^3-13636*t*s^4+3640*t^4*s^4+1994*s^3+13128*t^3*s^2-20688*t^3*s^
5-11240*t*s^5+2069*t^4*s^5-5852*t*s^2-3173*s^5+1976*s^6-5645*s*t^2-29851*t^4*s
+42020*t^5*s^2-5608*t^4*s^2-78120*s^6*t^3+296*s^2+13928*t^5*s-344*t^6*s^6+
18280*t*s-845*s^5*t^2-15592*s^5*t^5-1928*t^6*s^2-17940*s^6*t+3336*s^6*t^4-\
16099*t^6*s+68020*t^5-312*t^6+712*s^2*t^2+1216*t^5*s^3-13418*t^6*s^3-5590*s^3*
t^2-40*t^6*s^4-87620*t^5*s^4+1560*t^2*s^6+56424*t^3-3992*t^4-28682*t^4*s^3+
1256*s^4*t^2+3581*t^6*s^5-78216*t^3*s^4;