Calculus Examples

$\sum_{n = 1}^{\infty} \frac{2^{n}}{n!}$

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$\sum_{n = 1}^{\infty} \frac{2^{n}}{n!}$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$