  In this paper we consider a variety of mixed character sums. In particular we
extend a bound of Heath-Brown and Pierce to the case of squarefree modulus,
improve on a result of Chang for mixed sums in finite fields, we show in
certain circumstances we may improve on some results of Pierce for
multidimensional mixed sums and we extend a bound for character sums with
products of linear forms to the setting of mixed sums.
