Columns: 3x^3, -x, and +2

Rows: 2x and -4

Top left box: 6x^4

Top middle box: -2x^2

Top right box: 4x

Bottom left box: -12x^3

Bottom middle box: ?

Bottom right box: -8

Image source: by Hadley Killen

What term goes where the question mark is?

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Type a concept, like “slope” or “photosynthesis”.

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