deletions | additions       diff --git a/dynamic.tex b/dynamic.tex  index 439eb09..77d4718 100644  --- a/dynamic.tex  +++ b/dynamic.tex 
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\begin{subequations}  \begin{align*}  T(i, x) &= (i-1)\frac{x^2 + x}{2} + ix\\  &= \frac{ix^2 + 3ix - x^2 - x}{2} x}{2}\\  &\in \mathcal{O}(ix^2)  \end{align*}  \end{subequations}