a) 5² + 9² - 2⁵=
b) 3•7² - 4²=
c)3•4³ + 2 • 9²=
d) (3³-6):21=
e) (12²-11²):1²⁰
F nu trebue
![A 5 9 2b 37 4c34 2 9d 3621e 12111F Nu Trebue class=](https://ro-static.z-dn.net/files/d75/5417af66a41ee5010bef024e00a239d7.jpg)