Can't tell yet, polys can be sexed only after a year or near a year, how years old are they? Basically poly sexing will be on their anal fin, which would be the last fin before their tailfin. The hint would be this, if the anal fin is broad, potential or cup looking fin it's male they use it to cup eggs and donate sperm when they mate, for the females it would be just straight anal fin.
senegal probably a male
albino sen would be a female
endli? dunno it's anal fin is covered but maybe a female.
last pic if it's another albino sen it's a male.
To help us further to sex your polys you need to label each who's who. I mean I can't tell whether if I'm sexing up the same poly in another pic or it's just the angle with the same poly. Hard to tell really if they're not yet a year old or so.