How do I prove $\Gamma, A, B \vdash C \Rightarrow \Gamma, A \wedge B \vdash C$? It makes sense to me in general (like, if we want to show $C$ is derivable from $A \wedge B$, we have to show it's derivable assuming $A$ and also $B$) but I'm stuck constructing a formal proof. The deduction theorem ($\Gamma \vdash A \wedge B \supset C$) seem to bring me no closer to some kind of axiom.
I'm presented with the whole bunch of axioms: $A \supset (B \supset A)$ $(A \supset (B \supset C)) \supset ((A \supset B) \supset (A \supset C))$ $A \supset (B \supset A \wedge B)$ $A \wedge B \supset A$ $A \wedge B \supset B$ $(A \supset C) \supset ((B \supset C) \supset (A \vee B \supset C))$ $A \supset A \vee B$ $B \supset A \vee B$ $(A \supset B) \supset ((A \supset \neg B) \supset \neg A)$ $\neg\neg A \supset A$ $\textbf{F} \supset A$ $A \supset \textbf{T}$