Hi I dont really understand what to do here. 
(-5) to the 0 power multiplied by X to the -1 power

(-5)0x-1

Any number to the zero power is 1, so write (1) in place of
(-5)0.

Now you have

(1)x-1

Now use the rule that the -N power of any number is the
reciprocal of the number to the N power. So write 
 in place of x-1



or just



Edwin