[" 310.If "a^(*)b^(*)c" means "(a+b)/(c)...

[" 310.If "a^()b^()c" means "(a+b)/(c)" for all numbers except "0" ,"],[" then "(abc)ab" is equal to "],[[" (a) "0," (b) "1],[" (c) "(a+b+c)/(ab)," (d) "(a+b+ac)/(bc)],[" (e) "(ab+bc+ca)/(a+b+c)]]

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