5180﹣705×6. 24÷2.4﹣2.5×0.87﹣1÷8﹣×7 8﹣3×1+1(5﹣1)÷[(+3.7)×] (4.84÷4﹣0.01)×(1﹣)[5+(3.6﹣2)×1]÷ [14.8+(3﹣1.5)×1]÷2.