38Ddg_Expr<Tensor2_symmetric_carat_Tensor2_symmetric<A, B, T, U, Dim, i, j, k, l>,
Ddg_Expr< Ddg_carat_Ddg_13< A, B, T, U, Dim, Dim23, i, j, k, l, m, n >, typename promote< T, U >::V, Dim, Dim23, i, k, m, n > operator^(const Ddg_Expr< A, T, Dim, Dim, i, j, k, l > &a, const Ddg_Expr< B, U, Dim, Dim23, j, l, m, n > &b)