Matrix with Varying Font Sizes

Here is an example of how to create a matrix with varying font sizes in Office Math. You can copy this example to the Commands window using the clipboard and use it in your own formula.

func G^{(%alpha" ," %beta)}-{ x-m x-n} = left[ matrix { arctan(%alpha) # arctan(%beta) ## x-m + x-n # x-m - x-n }right]