Answer
$4x^3-15x^2+45x-136+\dfrac{407}{x+3}$
Work Step by Step
Using the long division method below, then
\begin{array}{l}\require{cancel}
(
4x^4-3x^3-x-1
)\div(
x+3
)
\\=
4x^3-15x^2+45x-136+\dfrac{407}{x+3}
.\end{array}
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