Boxes in Boxes

When there are boxes inside other boxes empty the inner boxes into their containers and simplify, then empty the last boxes onto the board.

These two boxes are on the board.






Results in






Results in





Results in





Emptying these onto the board results in




In mathematics

2(8 + x + 3(2x – 1)) = 2(8 + x + 6x – 3) = 2(8 – 3 + 7x) = 2(5 + 7x) = 10 + 14x


Using cards




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Gives the same results as




Gives the same results as



Gives the same results as




Gives the same results as




Gives the same results as