2. Holly collects video games. She starts with 3x³ games, for some numberx, and then buys another 7x⁴. She then gives away x², then sells 5x, and finally donates another 9 games. Write an expression for the number of games Holly now has in standard form
A -9 + 7x4 - 5x + 3x3 - x2
B 3x3 – 5x + 7x4-9-X2
C 7x4 + 3x3 - x - 5x - 9
D -9-5x - x2 + 3x3 + 7x4​