This document describes the steps to solve the math problem (4n^2 + 5n +3)(3n-1 + 5). The steps are: 1) create a table with the terms of each factor; 2) multiply the terms in each column by the terms in each row; 3) organize the results by exponent; 4) combine like terms. The final simplified expression is 47n^6 + 20n + 9n + 15.