A biologist has found that the number of branches on a certain rare tree in its first few years of life can be modeled by the polynomial b(y

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