dau coroana,5stele help my

a) (1/3)^0 +(1/3)^21:[(1/3)^6]^]3=
1+(1/3)^21:(1/3)^18=
1+(1/3)^3=
1+(1/27)=
**amplificam pe 1 cu 27**
(27/27)+(1/27)=28/27
b) (4/9)^0-(4/9)^30:[(4/9)^4]^7=
1-(4/9)^30:(4/9)^28=
1-(4/9)^2=
1-(16/81)=
**amplificam pe 1 cu 81**
(81/81)-(16/81)=65/81
SPER CA TE-AM AJUTAT