-(5又2/3)-( 1/4) (-1/3) ( 5)-(-1又1/4)

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-(5又2/3)-(1/4)(-1/3)(5)-(-1又1/4)-(5又2/3)-(1/4)(-1/3)(5)-(-1又1/4)-(5又2/3)-(1/4)(-1/3)(5)-(-1又1/4)原式=-

-(5又2/3)-( 1/4) (-1/3) ( 5)-(-1又1/4)
-(5又2/3)-( 1/4) (-1/3) ( 5)-(-1又1/4)

-(5又2/3)-( 1/4) (-1/3) ( 5)-(-1又1/4)
原式
=-（5又3分之2+3分之1）-（4分之1-1又4分之1）
=-6+1
=-5


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