Table Top Role-Playing Game Dice Roller
dndd 2d20 2
or
dndd 2 2d20
The order of arguments doesn't matter. All numbers that do not contain a "d" will be added to the total as modifiers
2d20 means roll a 20-sided die twice and add their totals together
Add "advantage" and "disadvantage". Maybe "ad20" and "dad20" ?