Amazing app!
If your stuck on a problem, use this for extra backup. Yes the wait time can be long, and question can go unanswered. But you still manage to get answers form here and there. The only problem I have, with it is the wait time, but keep in mind, these are regular people, not tutors. So dont expect too much, and for all your questions to be solved. But download to have something to fall back on, if you have no other help elsewhere.
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MathChat - Homework Help Community for Math and Physics