Which quotient does not belong with the other three?explain your reasoning?

Example:       The "x" is where the base is, the "2" is the power/exponent of the base

The 3rd quotient:  does not belong with the other three because it has two different bases of -4 and -3. [You can't combine powers/exponents if they have different bases.]

The other quotients have the same bases:  

   same base of -10

     same base of 6

    same base of 5        

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9