原式=[56+1]*55/56+(28-1)27/28
=56*55/56+55/56+28*27/28-27/28
=55+55/56+27-27/28
=82+1/56
=82又1/56
原式=(-22/7)×[(-7)+19-5]
=(-22/7)×7
=-22
原式=(7/9×36-5/6×36+7/18×36)-[6×(1.45+3.95)]
=(略,因为太麻烦了,Sorry)
=27
原式=[-5/12-5/6+(2/3+3/8)]x24x(5/9-2/9+2/3)
=(同略,真滴很Sorry)
=-5