Proof of proveit.numbers.addition.subtraction.subtraction_disassociation theorem

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

%proving subtraction_disassociation

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

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