Math Game: Math Man

This Math Man game is very similar to the Pac-Man game. Here in this game, you have to eat the ghosts. However, ghost can be eaten in the order. Mark circles appearing in the maze. Once you eat these circles, a Mathematical equation will appear which you will have to solve while saving Pac-Man from ghosts. The solution of this Math equation will be written on one of these ghosts. So that particular ghost you can eat which is given by solving the equation. 
One by one you have to solve all the equations to eat all the ghosts in the maze.