（2/3－2/8＋2/15－2/24＋2/35－2/48﹢2/63－2/80）=(C-D)S'N8Q+z(d6K'a7N+U1W/y)S(E9f
算式：提示:l6k+x7R'L/{2A7N+U1W/y)S(E9f