Permutation polynomials over F2n of the form (x2i+x+δ)s1+(x2i+x+δ)s2+x

Permutation polynomials having the form (x2i+x+δ)s1+(x2i+x+δ)s2+x over finite fields of even characteristic are investigated in this paper. Eight classes of such polynomials are proved to be permutations.