Which of the following statements is false? a) (8y^2+2) - (4y^2) = 10y^2-2 b) (y^2-7) + (2y^2+2) = 2y^2-9 c) (y^2-7) + (2y^2+3) = 3y^2-4 d) (y^3-y) - (y^2+4) = y^3-y^2-y-4

We need to calculate each option:

a) (8y^2+2) - (4y^2) = 4y^2+2 this one is false

b) (y^2-7) + (2y^2+2) = 3y^2-5 this one is false

c) (y^2-7) + (2y^2+3) = 3y^2-4 this one is right

d) (y^3-y) - (y^2+4) = y^3-y^2-y-4 this one us right

The false statements are a) and b)