Answer
$s^2-\frac{301}{200}s+\frac{1703}{400}+\frac{{891}}{{4(200s+300)}}
$
Work Step by Step
With the given revenue and expenses, then
$$
\frac{\text{revenue}}{\text{expenses}}=\frac{200s^3-s^2+400s+1500}{200s+300}
.$$
Using the long division method shown below, then
$$\begin{aligned}
&
(200s^3-s^2+400s+1500)÷(200s+300)
\\&=
s^2-\frac{301}{200}s+\frac{1703}{400}+\frac{\color{red}{891}}{\color{blue}{4(200s+300)}}
.\end{aligned}
$$
