Can somebody help me with these few questions?
(16 points)
Thank you so much!

Answer:
1. 11s² - 21st
2. 6st - t²
3. x7
4. -22
5. IDK
6. 95x -1
the exponent for 3 is after the variable.
The demand for the question is not clear, but I tried to simplify it for you