-(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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