(1)计算 2×(-3)+(-3)°- 4 ;(2)化简: (1+ 1 m-1 )÷ m m 2 -1
(1)计算2×(-3)+(-3)°-4;(2)化简:(1+1m-1)÷mm2-1....
(1)计算 2×(-3)+(-3)°- 4 ;(2)化简: (1+ 1 m-1 )÷ m m 2 -1 .
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