Answer
$(3+x)^{\wedge}(3\star x)/(x+1)$
Work Step by Step
$(3+x)^{\wedge}(3\star x)/(x+1)$
or
$((3+x)^{\wedge}(3\star x))/(x+1)$
There is no real need to enclose the numerator in parentheses,
because $(3+x)^{\wedge}(3\star x)$ is one term.
The denominator must be enclosed in parentheses,
the base of the power, $3+x$, must be enclosed in parentheses
and exponents must be enclosed in parentheses,
otherwise, for example,
$3+x^{\wedge}(3\star x)/(x+1) \quad $ generates $3+\displaystyle \frac{x^{3x}}{x+1}$
$(3+x)^{\wedge}3\star x/(x+1) \quad $ generates $(3+x)^{3}\displaystyle \cdot\frac{x}{x+1}$. etc.
