calculeaza ca putere:5la puterea140:25la puterea70+8la puterea32:16la puterea24+100la putea 25:10la putea 48-2la putea 2×5la puterea2.......b)..(7la puterea 11)×(7la puterea 13)÷(7la puterea 18)13×7la puterea 2+1la puterea2017-2la puterea 1×5 la puterea 2