giúp mình với cả câu 4) [ 5mũ 29 + 5 mũ 30 × ( 16-11)] :5 mũ 29

`4)[5^29+5^30.(16-11)]:5^29`

`=[5^29+5^30. 5]:5^29`

`=[5^29+5^31]:5^29`

`=5^29: 5^29+5^31: 5^29`

`=5^0+5^2`

`=1+25`

`=26`

`5)325+172-72+65`

`=(325+65)+(172-72)`

`=390+100`

`=490`

`6)214+(-54)+(-14)+(-46)`

`=214-54-14-46`

`=(214-14)-(54+46)`

`=200-100`

`=100`

`7)245-[(3^2-2^2).10-5]`

`=245-[(9-4).10-5]`

`=245-[5.10-5]`

`=245-[50-5]`

`=245-45`

`=200`

`8)25.2^3-(9-14)+(29-34+20)`

`=25.8-(-5)+[(-5)+20]`

`=200+5+15`

`=205+15`

`=220`