Theorem 2eximdv

Deduction form of Theorem 19.22 of [Margaris] p. 90 with two quantifiers, see exim. (Contributed by NM, 3-Aug-1995.)

Hypothesis
2alimdv.1
\( \vdash \varphi \rightarrow \psi \rightarrow \chi \)
Conclusion
\( \vdash \varphi \rightarrow \exists x \, \exists y \, \psi \rightarrow \exists x \, \exists y \, \chi \)
Proof
2alimdv.1
eximdv _
eximdv _