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Tip 1: I think you'll find \dfrac{.} works much better for fractions. Just quote this post to see how to use the code.
\(\displaystyle \dfrac{1}{2} + \dfrac{2}{3} + \dfrac{5}{6}\)

Tip 2: When doing exonents ^ is typically used. Again, quote to see the code.
\(\displaystyle 3^{23}\)

Because of that problem, I strongly recommend not using \dfrac. Instead, use \frac within math tags. The fraction may appear rather small if \frac is used between dollar symbols.