Fuente TeX:

-\int_{-V-a}^{V-a} \frac{1-p}{2a} \log \frac{1-p}{2a} dx = - \frac{1-p}{2a} \log \frac{1-p}{2a} \int_{-V-a}^{V-a}dx = \left( - \frac{1-p}{2a} \log \frac{1-p}{2a} \right) 2V = \frac{V}{a} \left( - (1-p) \log (1-p) + (1-p)\log 2a \right)