（1）[2/(m-1)²] ÷ (1-m)= [2/(1-m)²] ÷ (1-m)= 2/(1-m)³（2）[(3x-6)/(x²-4)] ÷ [(x+2)/(x²+4x+4)]= {2(x-2)/[(x+2)(x-2)]} ÷ [(x+2)/(x+2)²]= [2/(x+2)] ÷ [1/(x+2)]= 2（3）[...