Question

calculate:
5 la puterea 20 *5-5 la puterea 21
6 la puterea 40 :6 la puterea 38
7 la puterea 8 totul la 7 : 7 la puterea 54
3 la puterea 28 : 9 la puterea 12 +3 la puterea 3la puterea 3 la puterea 1 - 3 la puterea 0 * (729:3 la puterea 5 + 3 la puterea 3 : (3 * 3 la puterea 2 - 18 la puterea 1 ))

Answer 1

5²⁰*5⁵ -5²¹= 5²⁵-5²¹=5²¹*(5⁴-1)=5²¹ *624
6⁴⁰ :6 ³⁸=6²=36
(7⁸)⁷ : 7⁵⁴=7²=49
3²⁸ : 9¹² + (3³)³)¹ - 3 ⁰ * (729:3 ⁵+ 3³  : (3 * 3² - 18¹)=
=3²⁸ :3²⁴ + 3⁹ - 1* (3⁶:3 ⁵+ 3³  :3³ - 18)= 3⁴+3⁹ - (3+1-18)=3⁴+3⁹ +14=
=3⁴(1+3⁵)+14=81* 244+14=19778