f#m7B7/Fm7Bb7 Chords

[onlydlonly]

I ran across these chords in a lesson book and I have no clue what they mean. Anybody want to help?

The B7 is not a b7 meaning a flat 7 it is actually a capital B as you can see in the second chord where the Bis followed by a b7

Thanks!

[gore234]

Maybe its F sharp minor chord with major seveth and a B major chord with a seventh played together.  I'm not sure tho.  If im right the other chord is F minor major seventh with added Bflat major seventh.  Is this jazz music? I guessing at what they might be.