Math Word Decode Fun Item - Level Hard. ATTENTION "Math Word Decode Fun" application is required or this item will not work. Math Word Decode Fun(Free): market: //details? Id=tw. Actman. Android. Games. Puzzles. Mathworddecode. [Function]. Unlock game level "Hard" mode. It will not show the "a" and "b" coefficient of the linear equation but just show "y=ax+b" text instead.