Does simple bracketing also consider to be added to the equivalency classes in a0? I just noticed that things like $\sum_{n=0}^{\infty}\frac{1}{\left(4n+1\right)}-\frac{1}{\left(4n+3\right)}$ and $\sum_{n=0}^{\infty}\frac{1}{4n+1}-\frac{1}{4n+3}$ give slightly different results.