从5个3/4的和里减去4/5的倒数，差是多少？4R0A-S5B)e+y8n5Y0j
算式：提示({0H*F,_/]8q9C4R0A-S5B)e+y8n5Y0j
答：差是'H2Q6t0e-H6P0S7x,u。4R0A-S5B)e+y8n5Y0j