Dice are a sufficiently important part of role-playing games that, from the earliest days of the hobby, a language has been used to describe combinations of dice to roll.
A die roll will be described as follows: The number of dice to roll, followed by the lower-case letter d, followed by the size of dice to be rolled. This combination can be followed by addends or multipliers to the result. Multipliers will always be listed first.
While it is recommended that you have a full set of the standard polyhedral dice, the only dice you actually need are four to six of the ten-sided dice (or 'd10').
Die rolls may receive bonuses or penalties from traits, status conditions or events. These bonuses always stack, regardless of how silly the number ends up being.