Final Answer
$-y^3+y^2+y$
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Step-by-step Solution
Specify the solving method
1
Apply the formula: $order\left(x,a,b\right)$$=order\left(x,a,b\right)$, where $a=y$, $b=1$ and $x=y+y^2-y^3$
$-y^3+y^2+y$
Final Answer
$-y^3+y^2+y$