Firstly, we need to distribute the scalar value of 8 in front of the second vector (-1,5):

8•(-1,5) = (-8,40)

Now, we can subtract the first vector (-71,-3) from the result of the above calculation:

(-71,-3) - (-8,40) = (-71+8, -3-40) = (-63,-43)

Finally, we divide the resulting vector (-63,-43) by the scalar value of 2 to get the final answer:

(-63,-43) / 2 = (-63/2, -43/2) = (-31.5, -21.5)