proposition: Lemma minus_minus: forall a b c, c <= b <= a -> a - (b - c) = a - b + c.
proof: Proof. intros. lia. Qed.
imports: Coq.Classes.Morphisms Coq.Classes.Morphisms_Prop Coq.Bool.Bool Coq.Arith.Arith Coq.micromega.Lia Coq.NArith.NArith Coq.ZArith.ZArith bbv.N_Z_nat_conversions bbv.Nomega