+ You can select and test the 2nd grade computerized tax problem.
+ Multiple problems may be repeated in one round.
+ This is an app to get used to the problem.
+ If you select the correct answer, it goes to the next question, and if it is wrong, it vibrates.
+ Multiple problems may be repeated in one round.
+ This is an app to get used to the problem.
+ If you select the correct answer, it goes to the next question, and if it is wrong, it vibrates.
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