1.Perfect irrelevant solutions under standard rule (+,-,*,/) and advanced rule (+,-,*,/,^,^^);
2.Check all irrelevant solutions for any one or all questions;
3.Training, test and comments on multiple solutions for one question by setting "Difficulty Level";
4.Support J(11), Q(12), K(13) as an option;
5.Training plan and training game with instructions and variety of options;
6.World Cup in 4 levels;
7.Personal collection management.
Software Keywords: difficulty level supports training game advanced personal