The number of gallons of water in a leaking pool is determined by the rate that the water is filling, 6g^2 + 3g − 2, and the rate that water leaks from the pool, 7g^2 − 2g − 3, where g represents the number of gallons entering or leaving the pool per minute. Enter the expression for the net change in gallons per minute of the water in the pool. Find the change in the amount when the rate, g, is 5 gallons per minute.

The change in the amount of the water is given by .

At a rate of 5 gallons per minutes the change of the volume will be

gallon(s) per minute.