What is the coefficient of z^4 in the expansion of(z^3+3z+1)^5?

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 72E
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What is the coefficient of z^4 in the expansion of(z^3+3z+1)^5?
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