Proof of proveit.numbers.summation.distributive_summation_spec theorem

import proveit
theory = proveit.Theory() # the theorem's theory

%proving distributive_summation_spec

With these allowed/disallowed theorem/theory presumptions (e.g., to avoid circular dependencies), we begin our proof of
distributive_summation_spec:
(see dependencies)

distributive_summation_spec may now be readily provable (assuming required theorems are usable).  Simply execute "%qed".