Subtract and simplify: (y^2 - 7y - 5) - (-3y^2 + 3y - 4)

A) 4y^2 + 4y - 9

B) 2y^2 - 10y + 4

C) 4y^2 - 10y - 1

D) 2y^2 - 7y - 9

Can someone explain to me intersecting lines

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