Rule to put a planned line into Lambda-normal form using both

beta and eta conversion.

The command format for LEXPD* is:

<n>LEXPD* P2 P1 A LNORM P2-HYPS P1-HYPS

"LINE" "LINE" "GWFF" "GWFF" "LINELIST" "LINELIST"

The arguments have the following meaning:

P2 : Line not in Lambda-normal Form

P1 : Line in Lambda-normal Form

A : Wff not in Lambda-normal Form

LNORM : Wff in Lambda-normal Form

P2-HYPS : Hypotheses

P1-HYPS : Hypotheses

Its priority is 1

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