deletions | additions       diff --git a/untitled.tex b/untitled.tex  index 36deca3..4d9f362 100644  --- a/untitled.tex  +++ b/untitled.tex 
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I_2(\mu, \sigma) = \int_{-\mu}^{0} \frac{(f'+\mu)}{\sqrt{2\pi}\sigma}\exp\left(-\frac{f'^2}{2\sigma^2}\right)df' \\  \end{equation}  \begin{equation}  I_2(\mu, \sigma) = \int_{-\mu}^{0} \frac{f'}{\sqrt{2\pi}\sigma}\exp\left(-\frac{f'^2}{2\sigma^2}\right)df' + \frac{\mu}{2} \,\,{\rm erf} \left( -\frac{\mu}{\sqrt{2}\sigma} \frac{\mu}{\sqrt{2}\sigma}  \right) \\ \end{equation}  ===