I'm not an expert mirela, but be very careful. There's a saying that if you put a poisonous mushroom into a pan of water with a cut garlic clove and boil it up, any poison in the mushroom'll turn it black - but I don't know if this really works or not. Some fungi found growing around oak or pine trees are edible, but unless a greengrocer knows his stuff, I'd personally leave well alone.
if you could do another photo of just one of them- top and underneath- I think I can make out gills underneath- and put something in the photo to help with size. Looking at the photo as it is I can match it up to several- some poisonous and some not.... so not worth taking the risk. There is no cure for a lot of the deadly ones.
thanks everyone for replies, i was just so excited to see such big wild mushroom, i finally put it in bin bad, even i didint really want to, but true, it is too risky to try:(