Help me you kings and queens

When you have a negative exponent, you move the base with the negative exponent to the other side of the fraction to make the exponent positive.

For example:

or

or

#1:  

#2.     Make the exponent positive  

#3:      Make the exponent positive  

#4.  

not sure but it may be b, as i said i'm not sure.

i agree because i see the other persons thinking is clear