Neymar grabbed his third goal of the World Cup when he got on the end of Luis Gustavo's cross to coolly finish past Charles Itandje in the Cameroonian goal.
Joel Matip got the equaliser for Cameroon less than 10 minutes after Neymar's opener.
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It did not take Brazil long to re-take the lead once again with Neymar once again the scorer. Not too sure about the goalkeeping, he does pretty much jump out of the way.
Fred put Brazil 3-1 ahead 4 minutes into the second half.
Fernandinho got the host nation's fourth.
