  In the first part of the paper we prove a necessary and sufficient condition
for the existence of the composition of formal power series in the case when
the outer series is a series of one variable while the inner one is a series of
multiple variables. The aim of the second part is to remove ambiguities
connected with the Right Distributive Law for formal power series of one
variable as well as to provide analogues of that law in the multivariable case.
