This is a simple dice distribution calculator. Input an expression like 3d6 + 2 and it will output the distribution of the sum of the dice rolls.
Expressions can get arbitrarily complex, with repetition, arithmetic operators, and functions.
For example, to compute a roll of 2d6 with advantage, you can use 3kh2d6 - read as "keep the highest 2 of 3 dice rolled".
To take the maximum of two results, you can use the ^ operator, or the max function (which can take any number of arguments).