(* Created with the Wolfram Language : www.wolfram.com *)
((20*Subscript[n, 4])/(9*Subscript[d, 1]*Subscript[d, 2]*Subscript[d, 3]*
    Subscript[d, 5]*Subscript[d, 10]*Subscript[d, 11]*Subscript[d, 14]*
    Subscript[d, 15]*Subscript[d, 18]) - (20*Subscript[n, 4])/
   (9*Subscript[d, 1]*Subscript[d, 2]*Subscript[d, 3]*Subscript[d, 6]*
    Subscript[d, 10]*Subscript[d, 11]*Subscript[d, 14]*Subscript[d, 16]*
    Subscript[d, 18]) + (5*Subscript[n, 1]*Subscript[n, 4])/
   (Subscript[d, 2]*Subscript[d, 3]*Subscript[d, 5]*Subscript[d, 9]*
    Subscript[d, 10]*Subscript[d, 11]*Subscript[d, 14]*Subscript[d, 15]*
    Subscript[d, 18]) - (5*Subscript[n, 3]*Subscript[n, 4])/
   (Subscript[d, 2]*Subscript[d, 3]*Subscript[d, 6]*Subscript[d, 9]*
    Subscript[d, 10]*Subscript[d, 11]*Subscript[d, 14]*Subscript[d, 16]*
    Subscript[d, 18]) + (5*Subscript[n, 6])/(Subscript[d, 2]*Subscript[d, 5]*
    Subscript[d, 9]*Subscript[d, 10]*Subscript[d, 14]*Subscript[d, 15]*
    Subscript[d, 18]*Subscript[d, 22]) + (10*Subscript[n, 7])/
   (Subscript[d, 4]*Subscript[d, 5]*Subscript[d, 7]*Subscript[d, 10]*
    Subscript[d, 11]*Subscript[d, 14]*Subscript[d, 15]*Subscript[d, 17]*
    Subscript[d, 20]) + (50*Subscript[n, 7])/(9*Subscript[d, 2]*
    Subscript[d, 3]*Subscript[d, 5]*Subscript[d, 7]*Subscript[d, 10]*
    Subscript[d, 15]*Subscript[d, 17]*Subscript[d, 18]*Subscript[d, 20]) + 
  (5*Subscript[n, 5]*Subscript[n, 7])/(Subscript[d, 2]*Subscript[d, 3]*
    Subscript[d, 5]*Subscript[d, 7]*Subscript[d, 10]*Subscript[d, 12]*
    Subscript[d, 15]*Subscript[d, 17]*Subscript[d, 20]) - 
  (5*Subscript[n, 12])/(Subscript[d, 4]*Subscript[d, 5]*Subscript[d, 6]*
    Subscript[d, 11]*Subscript[d, 13]*Subscript[d, 15]*Subscript[d, 16]*
    Subscript[d, 20]))/(512*Sqrt[6])
