[-4又3/1] +[-3.1416]+3又3/1=

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[-4又3/1] +[-3.1416]+3又3/1=

[-4又3/1] +[-3.1416]+3又3/1=
[-4又3/1] +[-3.1416]+3又3/1=

[-4又3/1] +[-3.1416]+3又3/1=
[-4又3/1] +[-3.1416]+3又3/1
=-13/3-3.1416+10/3
=-3/3-3.1416
=-4.1416