Am nevoie urgent de raspuns la cele doua exercitii

1. a. 343-25=318
b. 477-0=477
c. 225-8=217
2. a. 35^78 > 35^68
b. 17^222 < 18^222
c. (2^5)^32 < (2^2)^141
2^160 < 2^282