1) 4^12 -You just need to add the powers if the main number is the same.
2) 6^7 -Just add the powers together.
3) 8^5 - you need to take away the 8 as both main numbers are the same.
4) (I couldn’t see it clearly but I think it said 7^8x7^5= 343
Hope this helped and you get your marks