(a^22 - 8 a^20 (b^2 + c^2) + b^2 c^2 (b^2 - c^2)^8 (b^2 + c^2) + 
  14 a^18 (2 b^4 + 3 b^2 c^2 + 2 c^4) - 
  a^2 b^2 c^2 (b^2 - c^2)^6 (3 b^4 + 5 b^2 c^2 + 3 c^4) + 
  2 a^4 b^2 c^2 (b^2 - c^2)^4 (2 b^6 + 5 b^4 c^2 + 5 b^2 c^4 + 
     2 c^6) - 4 a^16 (14 b^6 + 23 b^4 c^2 + 23 b^2 c^4 + 14 c^6) + 
  a^6 (b^4 - c^4)^2 (b^8 - 8 b^6 c^2 + 7 b^4 c^4 - 8 b^2 c^6 + c^8) + 
  a^14 (70 b^8 + 106 b^6 c^2 + 113 b^4 c^4 + 106 b^2 c^6 + 70 c^8) - 
  a^8 (b^2 - c^2)^2 (8 b^10 + 3 b^8 c^2 + 7 b^6 c^4 + 7 b^4 c^6 + 
     3 b^2 c^8 + 8 c^10) - 
  2 a^12 (28 b^10 + 31 b^8 c^2 + 31 b^6 c^4 + 31 b^4 c^6 + 
     31 b^2 c^8 + 28 c^10) + 
  a^10 (28 b^12 + 7 b^10 c^2 + 17 b^8 c^4 + 4 b^6 c^6 + 17 b^4 c^8 + 
     7 b^2 c^10 + 28 c^12) :  
 a^20 c^2 + b^6 (b^2 - c^2)^8 - a^18 (3 b^2 c^2 + 7 c^4) + 
  a^16 (b^6 + 4 b^4 c^2 + 13 b^2 c^4 + 20 c^6) - 
  2 a^14 (4 b^8 + 4 b^6 c^2 + 3 b^4 c^4 + 9 b^2 c^6 + 14 c^8) - 
  a^2 (b^2 - c^2)^5 (8 b^10 - 2 b^8 c^2 + 2 b^6 c^4 + 4 b^4 c^6 + 
     2 b^2 c^8 + c^10) + 
  a^12 (28 b^10 + 13 b^8 c^2 + 5 b^6 c^4 - 6 b^4 c^6 + 3 b^2 c^8 + 
     14 c^10) + 
  a^4 (b^2 - c^2)^3 (28 b^12 - 8 b^10 c^2 + 5 b^8 c^4 + 5 b^6 c^6 + 
     9 b^4 c^8 + 8 b^2 c^10 + 7 c^12) + 
  a^10 (-56 b^12 + 7 b^10 c^2 - 9 b^8 c^4 + 8 b^6 c^6 + 8 b^4 c^8 + 
     10 b^2 c^10 + 14 c^12) + 
  a^8 (70 b^14 - 62 b^12 c^2 + 17 b^10 c^4 + 4 b^8 c^6 - 12 b^6 c^8 + 
     8 b^4 c^10 + 3 b^2 c^12 - 28 c^14) + 
  a^6 (-56 b^16 + 106 b^14 c^2 - 62 b^12 c^4 + 4 b^10 c^6 + 
     4 b^8 c^8 + 8 b^6 c^10 - 6 b^4 c^12 - 18 b^2 c^14 + 20 c^16) :  
 a^20 b^2 + c^6 (b^2 - c^2)^8 - a^18 (7 b^4 + 3 b^2 c^2) + 
  a^16 (20 b^6 + 13 b^4 c^2 + 4 b^2 c^4 + c^6) - 
  2 a^14 (14 b^8 + 9 b^6 c^2 + 3 b^4 c^4 + 4 b^2 c^6 + 4 c^8) + 
  a^2 (b^2 - c^2)^5 (b^10 + 2 b^8 c^2 + 4 b^6 c^4 + 2 b^4 c^6 - 
     2 b^2 c^8 + 8 c^10) + 
  a^12 (14 b^10 + 3 b^8 c^2 - 6 b^6 c^4 + 5 b^4 c^6 + 13 b^2 c^8 + 
     28 c^10) + 
  a^10 (14 b^12 + 10 b^10 c^2 + 8 b^8 c^4 + 8 b^6 c^6 - 9 b^4 c^8 + 
     7 b^2 c^10 - 56 c^12) - 
  a^4 (b^2 - c^2)^3 (7 b^12 + 8 b^10 c^2 + 9 b^8 c^4 + 5 b^6 c^6 + 
     5 b^4 c^8 - 8 b^2 c^10 + 28 c^12) + 
  a^8 (-28 b^14 + 3 b^12 c^2 + 8 b^10 c^4 - 12 b^8 c^6 + 4 b^6 c^8 + 
     17 b^4 c^10 - 62 b^2 c^12 + 70 c^14) + 
  2 a^6 (10 b^16 - 9 b^14 c^2 - 3 b^12 c^4 + 4 b^10 c^6 + 2 b^8 c^8 + 
     2 b^6 c^10 - 31 b^4 c^12 + 53 b^2 c^14 - 28 c^16) )