Construction of noniterated Boolean functions in the basis $\{\&,\vee,-\}$ and estimation of their number

In this paper we consider noniterated Boolean functions in the basis $\{\&,\vee,-\}$. We obtain the canonical form of the formula for a noniterated function in this basis. We construct the set of such formulas in terms of the variables $x_1,\dots,x_n$ and calculate the number of its elements. Based on these results, we obtain the upper and lower bounds for the number of noniterated Boolean functions of $n$ variables in the basis under consideration.