(66-32×1.2)÷0.25 12.5×(1618-8.4÷0.12)
(2.4×1.5-1.5)÷0.7
(3.2+3.2+3.2+3.2) ×2.5
+-
3600÷45×90
93.6÷[(54.8+45.2)×0.06]