How can Ari simplify the following expression? (5/a-3-4) / (2+1/a-3)

We are given with the expression (5 / (a-3) - 4) / (2+1 / (a-3)). to simplify the expression, first the numerator (5 / (a-3) - 4 (a-3)) / (a-3) = (5 - 4a + 12) / (a-3) = 5 - 4a + 12 = (17 - 4a) / (a-3). for the denominator, (2 (a-3) + 1 / (a-3)) / (a-3) = (2a-6 + 1) / (a-3) = (2a - 5) / (a-3). the expression would be simplified to (17-4a) / (2a - 5)