简算(3+3/4/3/4+3)-(7*1/6/7*1/6)=
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简算(3+3/4/3/4+3)-(7*1/6/7*1/6)=
简算(3+3/4/3/4+3)-(7*1/6/7*1/6)=
简算(3+3/4/3/4+3)-(7*1/6/7*1/6)=
(3+3/4/3/4+3)-(7*1/6/7*1/6)
=(3+3/4×4/3+3)-(7/6×6/7)
=(3+1+3)-1
=6