(-52)+(-19)-(+37)-(-24)脱试,

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(-52)+(-19)-(+37)-(-24)脱试,
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(-52)+(-19)-(+37)-(-24)脱试,
(-52)+(-19)-(+37)-(-24)脱试,

(-52)+(-19)-(+37)-(-24)脱试,
=-52-19-37+24=-71-37+24=-108+24=-84