The image is a bit hard to read, but I presume you have:
$\displaystyle \frac{1}{2}x^{-\frac{1}{2}}(3x+1)^{\frac{1}{2}}-\frac{3}{4}x^{ \frac{1}{2}}(3x+1)^{-\frac{1}{2}}$
First, look at the constant factors...they have $\displaystyle \frac{1}{4}$ as factors. Then look at the variable factors and pull out the factors with the smallest exponents.
What do you get?
We use a typesetting language called latex. Below is the way to write a simple equation in latex. Using Latex, you can write math and it is beautiful and easy to read
The below link shows you how to use Latex.
Introducing LaTeX Math Typesetting
Yes, that's what will be out front, and what will be the factor left within parentheses?
We are using $\displaystyle \LaTeX$ to write the math expressions. Do a search here and online to find out how to use it. It is fairly straightforward.