1)0.7x5^4-37.5=0.7x625-37.5=437.5-37.5=400
2)-9^4x2.1+13700.1=-6561x2.1+13700.1=13778.1+13700.1=27478.2
3)6.3-10^3x0.0073=6.3-1000x0.0073=6.3-7.3=-1
4)192x(-0.2)^3-0.112=192x(-0.008)-0.112=-1.536-0.112=-1.648
5)-240+7^4x0.02=-240+2401x0.02=-240+48.02=-191.98
6)10^4x3.241+7590=10000x3.241+7590=32410+7590=40000