Yeah... I'm an idiot... but, in my defense, I've been doing mostly Python programming lately!!

The
correct the syntax for "combining" multiple outputs for a print() statement in LUA is ".." not ","

Try:
function dobet()
print("Roll: " .. lastBet.Roll)
if (lastBet.Roll < 3.3 or lastBet.Roll > 96.7) then
chance = 49.1089
end
...