A simple expression i'm having trouble with because I have forgotten some basic rules to math.

"Find the exact value for each of the following expressions"

Sin(Pi/4)-Cos(Pi/6)+tan(Pi/3)

= sqrt2/2 - sqrt3/2 + sqrt3

This is where i'm stuck because I forget if you can multiply each term to have a common denominator. I ended up with:

sqrt2 + sqrt3 / 2

Help?