Can you present the derivation of the following logical statement?
((Q ∧ R) → P), (¬(R → S) → (¬W → Q)), (Q ∨ ¬S) ⊢ (R → (P ∨ W))
user
One possible derivation is:

1. (Q ∧ R) → P        Premise
2. ¬(R → S) → (¬W → Q) Premise
3. Q ∨ ¬S              Premise
4. | R                 Assumption
5. | | ¬W              Assumption
6. | | ¬(R → S)        Modus Tollens 4, 2
7. | | R ∧ ¬S          Conjunction Introduction 4, 6
8. | | Q               Disjunction Elimination 3, 7
9. | Q                 Negation Elimination 5-8
10.| Q ∧ R             Conjunction Introduction 4, 9
11.| P                 Modus Ponens 1, 10
12.| P ∨ W             Disjunction Introduction 11
13.R → (P ∨ W)         Conditional Proof 4-12
assistant
What do each of the operators mean?
user