Classify (by degree) the following polynomial:

-2x² - x⁵ +2x - 5

Add the following polynomials:

(x³ + 6x - 5) + (-6x² + 4x + 3)

Add the following polynomials:

(12x² + 3x⁴ - 6x - 2) + (-3x⁴ + 5x + 9 - 7x²)

Subtract the following polynomials:

(6x² + 10x - 9) - (4x² - 13)

Subtract the following polynomials:

(-5x² + x³ - 2x + 3) - (-5x² -x³ + 4x + 8)

Multiply the following polynomial by the monomial:

3x(4x² - x - 3)

Multiply the following polynomial by the monomial:

-x³(2x³ - x² + 5)

Multiply.

(x + 7)²