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Yes you can study on this site. this is a very useful, knowledgeable site. i also joined here yesterday and i am like addicted to this. i always like to answer others questions. it is very useful to you but you must not blindly read everything what is given here as this is not edited by any superior person. so it is your consciousness to choose what is right and whT is wrong. 
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yes you can study on this site it is very useful and knowledgeable

there are competition in your own profile

uyou answer a question you get point and you get titles etc.

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