Theorem ad5ant123

Deduction adding conjuncts to antecedent. (Contributed by Alan Sare, 17-Oct-2017.) (Proof shortened by Wolf Lammen, 23-Jun-2022.)

Hypothesis
ad5ant.1
\( \vdash \varphi \wedge \psi \wedge \chi \rightarrow \theta \)
Conclusion
\( \vdash \varphi \wedge \psi \wedge \chi \wedge \tau \wedge \eta \rightarrow \theta \)
Proof
ad5ant.1
3expa _
ad2antrr _