Dice roller bot

Bot for rolling dice. Just type roll after slash / /d2 /3d4 /d6+5 /4d6h3 - roll 4d6 and take highest 3 /4d6l2 - roll 4d6 and take lowest 2 /6x4d6h3 - 6 times roll 4d6 and take 3 highest /(6+4d20l2)x4 - roll 6+4d20l2 expression 4 times /d6+2d8*3d12/(6+4d20l2) - expression