1/6=1/42+1/7=1/()+1/()=1/()+1/()=1/()+1/()

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1/6=1/42+1/7=1/()+1/()=1/()+1/()=1/()+1/()
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1/6=1/42+1/7=1/()+1/()=1/()+1/()=1/()+1/()
1/6=1/42+1/7=1/()+1/()=1/()+1/()=1/()+1/()

1/6=1/42+1/7=1/()+1/()=1/()+1/()=1/()+1/()
1/6=1/42+1/7=1/(24)+1/(8)=1/(12)+1/(12)=1/(18)+1/(9)