3/8×4/5-1/6÷2/3+`:k8w*h.T-E2~7s:m-\*w
算式：提示4_5k)O.n2f+`:k8w*h.T-E2~7s:m-\*w
=7l:f'U8_1f5c5c+y)d/p+`:k8w*h.T-E2~7s:m-\*w