First one is fourth option becuase 2 in 8 is 4 and with the exponenst you subtract them and get 4m^4 and 2 in 10 is 5 subtract the exponents and you will get -5m^2
Second one is the second option.. this is becuase you will multiply crossed for both so multiply 7(x-5) and 3(x-3) when you do you will get 7x-35/x-3+3x-9/x-5 now add them and you will get 10x-44/(x-3)(x-5)
Hope this helps