12又1/3+(7又2/5+5又2/7)÷3又2/3+2又1/5+1又4/7的和等于多少?=12又1/3+(37/5+37/7)x3/11+2又1/5+1又4/7=37/3+111/55+111/77+11/5+11/7=37/3+111/55+111/77+121/55+121/77=37/3+232/55+232/77=37/3+1624/385+1160/385=37/3+2784/385=14245/1155+8352/1155=22597/1155