Some classes of permutation polynomials of the form (xpm−x+δ)s+x(xpm−x+δ)s+x over Fp2mFp2m

In this paper, some new classes of permutation polynomials with the form (xpm−x+δ)s+x(xpm−x+δ)s+x are investigated by determining the number of solutions of some equations over Fp2mFp2m.