## Introductory Algebra for College Students (7th Edition)

7x$^4$-5y$^3$+3y$^2$-y-4
Combine like terms vertically to find the solution. $7y^4-6y^3+4y^2-4y$ $\underline{\qquad\quad y^3-\,y^2+\;3y-4}$ $7y^4-5y^3+3y^2-y-4$