Theorem ad5ant15

Deduction adding conjuncts to antecedent. (Contributed by Alan Sare, 17-Oct-2017.) (Proof shortened by Wolf Lammen, 14-Apr-2022.)

Hypothesis
ad5ant2.1
\( \vdash \varphi \wedge \psi \rightarrow \chi \)
Conclusion
\( \vdash \varphi \wedge \theta \wedge \tau \wedge \eta \wedge \psi \rightarrow \chi \)
Proof
ad5ant2.1
adantlr _
ad4ant14 _