From rules page:
Max-It is a unique dice game played with a special set of five dice. Three regular d6s and two "function" dice, each of which has two Plus (positive) signs, two Minus (negative) signs and two Times (multiplication) signs. Game play involves rolling and re-rolling the dice, and grouping them in various combinations to produce the most desired results.
The game is divided into three rounds, each with a different objective. A round consists of three turns and a Max-It roll for each player. A Max-It roll uses only two dice, one regular and one function, and may cause a scoring upset. After three rounds, each player takes a final Max-It roll. The player with the highest total score wins.
Round 1 - Players try for high positive scores.
Round 2 - Players try for high negative scores.
Round 3 - Players try for the greatest difference between two dice rolls.
Components include 5 dice (3 regular and 2 function), dice cup, instructions and players' score pad.