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原式=-1+5×5/6÷(-5/4)-4^2012×(-1/4)^2013 =-1+5×5/6×(-4/5)-4^2012×(-1/4^2013) =-1-10/3+1/4 =-1-3-1/3+1/4 =-4-(4/12-3/12) =-4又1/12
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