#### Answer

7x$^4$-5y$^3$+3y$^2$-y-4

#### Work Step by Step

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

Published by
Pearson

ISBN 10:
0-13417-805-X

ISBN 13:
978-0-13417-805-9

7x$^4$-5y$^3$+3y$^2$-y-4

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