Step 1 :Define the savings rate function as \(S^{\prime}(x) = 100 - x^{2}\) and the cost rate function as \(C^{\prime}(x) = x^{2} + \frac{14}{3}x\).
Step 2 :Find the number of profitable years by solving for \(x\) when \(S^{\prime}(x) > C^{\prime}(x)\). The solution is \(x = 6\) years.
Step 3 :Find the net total savings during the first year by subtracting the cost from the savings for the first year, i.e., \(S(1) - C(1)\), where \(S(x)\) and \(C(x)\) are the antiderivatives of \(S^{\prime}(x)\) and \(C^{\prime}(x)\) respectively. The solution is \$97.
Step 4 :Find the net total savings over the entire period of use by subtracting the total cost from the total savings over the entire period of use, i.e., \(S(n) - C(n)\), where \(n\) is the number of profitable years. The solution is \$372.
Step 5 :Final Answer: The number of profitable years is \(\boxed{6}\) years. The net total savings during the first year of use of the machine is \(\boxed{\$97}\). The net total savings over the entire period of use of the machine is \(\boxed{\$372}\).