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First select the operation(s).
Any combination of operations can be selected.

In this example only additions are selected.

Press to begin the game.

Press to see your scores so far

When you press a tile its text will be displayed.

In the screenshot above the tiles do NOT match

When you press matching tiles they will be removed:

The goal is to remove all tiles.
The best score for every combination will be recorded.

A combination having a question mark indicates you did not yet played with that specific combination