Question

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

Answer 1

The demand for the question is not clear, but I tried to simplify it for you

Answer 2

1. 11s² - 21st

2. 6st - t²

3. x7

4. -22

5. IDK

6. 95x -1

the exponent for 3 is after the variable.