原式=36x1/4+(5/4x2)/(7/4+5/4)+1x5/2+5/2x22/3=9+10/4x4/12+5/2+55/3=9+5/6+5/2+55/3=9+5/6+15/6+110/6=9+130/6=9+21+4/6=30又2/3
30又三分之二
30又2/3
