Equation Icon  ∑ ℱ(p)i1⋅⋅⋅ip+1 = (𝒩 −1)m1i1 ⋅⋅⋅(𝒩 −1)mp+1ip+1F(p)m1⋅⋅⋅mp+1, (2.22 ) m1,⋅⋅⋅,mp+1