polynomial mix operation

Find the sum.
(2x² + 5x - 7) + ( 3 - 4x² + 6x)

• 2x² + 3x +1
• -2x² - 11x -4
• 2x² + 5x -7
• -2x² + 11x -4

Find the difference. 
(3- 2x + 2x²) - (4x -5 +3x²)

• x_² + 6x + 8
• 2x² + 5x - 7
• -x² -6x + 8
• -2x² + 11x - 4

Simplify:

• -5a⁶ - 5a⁴
• -3a³  - 1a²
• -2a³  - 6a²
• 5a³ - 5a²

Simplify:

• 9n³ + 4n
• 7n³ + 6
• -3n³ + 2
• 7n⁶ + 6

(x - 3)(x +10)

• x^2 - 7x + 13
• x^2 - 6x - 30
• x^2 + 7x - 30
• x^2 + 13x + 30

(x + 5)(x + 4)

• x^2 + x + 20
• x^2 + 20x + 9
• x^2 + 9x + 20
• x^2 - 9x + 54

(4x + 3)(x + 2)

• x² + 11x + 6
• 4x² + 8x + 6
• 4x² + 3x + 6
• 4x² + 11x + 6

(x - 1)(x - 8)

• x² + 9x + 8
• x² + 9x - 8
• x² - 9x - 8
• x² - 9x + 8

Mathematical Equivalence

OFF

Multiply
x²(2x+3)

• x²+2x+3
• 2x+3
• 2x²+3x
• 2x³+3x²