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A biologist has found that the number of branches on a certain rare tree can be modeled by the polynomial b(y) = 4 y 2 + y, where y is the number of years after the tree reaches a height of 6 feet. The number of leaves on each branch can be modeled by the polynomial l (y) = 2 y 3 + 3 y 2 + y. Write a polynomial describing the total number of leaves on the tree