Major 7 augmented; Dominant 7 augmented

[pdxdjazz]

This doesn't address your question concerning the use of "+" but,
both Δ7#5 and 7#5 are in the chord quality picker.

Augmented Test - Unknown Composer


The first 7 chords are recognized by the player, the last 3 aren't.

C7#5, C7+ and C+7 seem to be recognized by the player as being the same.
)BOB