Consider the following functions. \[ f=\{(1,-3),(4,5)\} \] and \[ g=\{(-4,-2),(-2,-4),(1,-3)\} \] Step 2 of 4 : Find $(f-g)(1)$.

Step 1 ：Consider the following functions: \(f=\{(1,-3),(4,5)\}\) and \(g=\{(-4,-2),(-2,-4),(1,-3)\}\).

Step 2 ：Find \((f-g)(1)\). The operation \((f-g)(1)\) means we need to find the value of \(f(1)\) and subtract the value of \(g(1)\) from it.

Step 3 ：Looking at the pairs in \(f\) and \(g\), we can see that \(f(1) = -3\) and \(g(1) = -3\). So, \((f-g)(1) = f(1) - g(1) = -3 - (-3)\).

Step 4 ：Calculate \((f-g)(1) = f(1) - g(1) = -3 - (-3)\) to get 0.

Step 5 ：Final Answer: \((f-g)(1) = \boxed{0}\)