MathJax の練習

\[ \sum_{n=1}^\infty \frac{1}{n^2} = \frac{\pi^2}{6}\]

\[E^Q\left[\exp\Bigl(-\int_t^T r_sds\Bigr)X(1 - N_T) | \mathcal{G}_t\right] = (1 - N_t)E^Q\left[\exp\Bigl(-\int_t^T R_sds\Bigr)X | \mathcal{F}_t\right] \]