计算：4k1^.y;N(A7z)b4O(I3`7N+E
1730÷54k1^.y;N(A7z)b4O(I3`7N+E
算式：提示2`-M*h+};B4k1^.y;N(A7z)b4O(I3`7N+E
=4|1h'M1]'@4k1^.y;N(A7z)b4O(I3`7N+E