1+1+2+56

1+1+2+56 1/2+56/1 56-6/2*1 1/56+1/40+1/2 (x+1)^2=(x+1)+56 1/2+2/3+...+55/56 1/2+1/6+1/12+...+1/56=快 57×55/56+1/56 1+2+8.5+8.9+56+5.4 1*2+23+34+45+56+...+99100 (1+2+3)*8/56=0.78+? x（x-1）=56×2 1+2的56次方等于几? 5+4+2+1+56+42 1+2+3+4+56+789= 1/55-1/56 1-1+30-56 计算：(15/2-(56^(1/2)))^(1/2)