-20/9 - (4*x)/9 + (4/3 + 16/(9*(-1 + x)) + (4*x)/3)*HPL[{0}, x] + 
 (16/9 + (16*x)/9)*HPL[{1}, x] + (1 - (8*Pi^2)/27)*
  PlusDistribution[-1, 1 - x] + (8*PlusDistribution[0, 1 - x])/3 + 
 (32*PlusDistribution[1, 1 - x])/9
