(-1)的三次方乘(-5)除【(-3)的二次方+2乘(-5)】=-1*(-5)/((-3)^2+2*(-5))=5/(9-10)=5/(-1)=-5
原式=(-1)×(-5)÷[9+(-10)]=(-1)×(-5)÷(-1)=6÷(-1)=-6
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