Question

7 la puterea 20 :7 la puterea 7: 7 la puterea 6

Answer 1

7 la puterea 20 : 7 la puterea 7 : 7 la puterea 6 = 7 la puterea 20 - 7 - 6 = 
= 7 la puterea 7

Answer 2

$7^{20}:7^7:7^6=7^{20-7-6}=7^7$