Hi Lenny271 you really helped me a lot i couldn´t reach it without this explanation thank you very much i really apreciate your reply that´s exactly what i was looking for.
Anyway let me just check it out about some aspect just to clear them out:

Exacta- This bet is when you wage two unique Horses that you think they might reach first and second places and you only win if they finish in the correct order of the bet i mean a/b

Exacta-Box-Same bet as above but you can wage on several groups of 2 Horses to finish 1/2 Places than because they are boxed the amount doubles

Quinella-Same as exacta but you win however A/B or B/A finishing order

Quinella box- same as exacta box but you win however B/A or A/B finishing Order

Am i Right?

About Odds in the case you show the best bet is to go for the lowest odd because the highest one mean they can be not reach the first positions.

Thank you and Cheers!:D