2/1+(3/1+3/2)+(4/1+4/2+4/3)+.省略+(60/1+60/2+60/3.+省略60/58+60/59)呵呵,没分了!
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1 2 3 4 ()
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),1/2-(3/4-3/8), 1/2+1/4-1/6 , 2/3+(1/2+1/4),
1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),1/2-(3/4-3/8),1/2+1/4-1/6 ,2/3+(1/2+1/4),
-1/2+(-1/6)-(-1/4)-2/3
1 2 3 4
1 2 3 4
1 2 3 4
1,2,3,4,
1 2 3 4
1 2 3 4
1,2,3,4,
1,2,3,4,
1,2,3,4,
1,2,3,4,
1 2 3 4
1,2,3,4,
1,2,3,4,