Dice Formulas

How complex can the dice rolls be? For instance, I recently typed "d12+2d6" into the roller, and it rolled a "1d12+2, 1d6"

What's the best way to roll a set of dice and have their individual results shown and the total tallied?

Right now, you can't add multiple dice types; you can add them to the same roll (1d12+2, 2d6) and then do some math on your end. I plan on adding more complex dice math, but it's not in place yet.