计算下面各题，能简便计算的用简便方法计算．
7.4×9.8﹣14.5                13.4+5.62+17.6+4.38            6.73×4.8+5.2×6.73           
8.4÷0.6+8.4÷0.4            （9.6+1.48÷3.7）÷8             5.8÷[4×（1.34﹣0.14）]．