When I'm writing expressions in an articles the fractions when not segregated in a single equation usually are a problem. One example is $\frac{x}{\log y}$ that can be written as $x\log y^{-1}$.
Another situation is when you have a long expression and want as the result half of this result. Example: $\frac{a + b + c + d + e + f}{2}$. It could also be written as $(a + b + c + d + e + f) \cdot 1/2$ or $(a + b + c + d + e + f) \cdot 0.5$ (with the symbol because without could not be clear enough).
1) Is there any better and more compact way to express that (half of a given expression)?
2) Are there any other situations where you use this kind of simplification (as in the example one) to avoid writing fractions?