Ответ:\(389-(57+189)=389-189-57=200-57=143\).\(8963-(963+500)=8963-963-500=8000-500=7500\).\(254-(154-87)=254-154+87=100+87=187\).\((870+738)-70=870-70+738=800+738=1538\).\((86+1037)-1027=86+(1037-1027)=86+10=96\).