3²- 2³= 3*3- 2*2*2= 9-8=1
10³:10 + 2²= 10*10*10 :10 + 2*2= 1000:10+ 4= 100+4=104
10: (10-3:1*3)=10:(10-3*3)=10:(10-9)=10:1=10
4:2*(3-2+1)=4:2*(1+1)=4:2*2=2*2=4
