OrderCD[%]

Out[19]=

                 p                  p                  p                  p
  R       sigma    + R       sigma    + R       sigma    + R       sigma    + 
   pbcd;e      ;a     pbce;d      ;a     pacd;e      ;b     pace;d      ;b
   
                   p                  p                  p                  p
    R       sigma    + R       sigma    + R       sigma    + R       sigma    + 
     pabd;e      ;c     pabe;d      ;c     pabc;e      ;d     pabe;c      ;d
   
                   p                  p             p                  p
    R       sigma    + R       sigma    - sigma   R        - sigma   R        - 
     pabc;d      ;e     pabd;c      ;e         ;p  a bc;de        ;p  a bd;ce
   
              p                                    p                 p
    sigma   R        - 4 sigma       - sigma     R     - sigma     R     - 
         ;p  a be;cd          ;abcde        ;pde  a bc        ;pce  a bd
   
                p                 p                 p                 p
    sigma     R     - sigma     R     - sigma     R     - sigma     R     - 
         ;pcd  a be        ;pbe  a cd        ;pbd  a ce        ;pbc  a de
   
                p                 p                 p                 p
    sigma     R     - sigma     R     - sigma     R     - sigma     R     - 
         ;pae  b cd        ;pad  b ce        ;pac  b de        ;pab  c de
   
                p   q
    sigma   R     R
         ;p  qba   c de

Up to Computational Challenges in Heat Kernel Calculations