5 / 4 plus 7 / 3 minus 7 / 4 minus 5 / 3 = () - () = () reasonable combination, simple operation

5 / 4 plus 7 / 3 minus 7 / 4 minus 5 / 3 = () - () = () reasonable combination, simple operation

5 / 4 plus 7 / 3 minus 7 / 4 minus 5 / 3 = 2 / 3 minus 2 / 4 = 1 / 6