Question

Plz can anyone slove 3 & 4 questions plzz ​

Answer 1

`{5}^(4 + 8 + 3) = {5}^(15) \\ \\ 90 - 19 = 71`

Answer 2

For question 3 its definitely 5^15 and I searched 4 so I thinks its 71 or 161? sorry I don't know angles but 3 is correct