1. Simplify: 2x^3 + 3x^2 + 5x^3 - 2x^2 -10x^3 -5x^2
a. 18׳ -10ײ
b. 8׳ -5ײ
c. -5× -5y
d. -5׳+ 5ײ

2.What is the sum of (3x-5y) and (-8x–10y)?
a. -11x – 15y
b. -5x – 15y
c. -5x – 5y
d. 11x – 15y

3.What is the sum of (6x3 – 4x^2 + 3) and ( -x^2+ x – 3)?
a. 6x^3– 3x^2 + x
b. 6x^3+ 3x^2 + x
c. 6x^3– 5x^2 + x
d. 6x^3 + 5x^2 + x

4.Solve: (4x + 2xy + 5xz) – (–4x – 3xy + 4xz) .
a. 8x + 5xy + xz
b. -xy + 9xz
c. xy + 9xz
d. 8x - 5xy - xz​