Roll Dice

Enter dice to roll as xdy±z, where
x = number of dice to roll (must be at least 1)
y = number of sides on dice (standard dice are 2, 4, 6, 8, 10, 12, 20, or 100 sided, but any integer > 1 is allowed)
z = any modifier (+1 to add 1 to the result, or -1 to subtract 1 from the result). This is optional.
  To roll multiple dice sets, separate them with a comma (,) or space (i.e. 2d6,3d6 4d8).
No spaces inside the dice set; do this: 3d6+2 not this 3d 6 +2.