# data[].attributes.body
= 4x^2 + 4x + 1 - (x^2 - 6x + 9)

= 4x^2 + 4x + 1 - x^2 + 6x -9

= 3x^2 + 10x -8

# data[].attributes.body
(2x + 1)^2 - (x-3)^2

= 4x^2 + 4x + 1 - (x^2 - 6x + 9)

= 4x^2 + 4x + 1 - x^2 + 6x - 9

= 3x^2 + 10x - 8