Polynomial Operations

Reorder the following polynomial into Standard Form

( 5 is the first number, 1 is the last number)

$$-x^2-15x+7x^4-6+3x^3$$  

Problem: $$5x$$

Classify the polynomial by degree​ (a)   & Number of terms:​ (b)  

Problem: $$4x^3+2x$$

Classify the polynomial by degree: ​ (a)   & Number of Terms ​ (b)  

Problem: $$3x^2+2x^3+4+5x^4-x$$

Classify the polynomial by degree:​ ​ (a)   ​ and terms:​ ​ ​ (b)  

Problem: $$x^2+4x+2x+8$$

Classify the polynomial by degree: ​ (a)   & Terms: ​ (b)  

What is the leading Coefficent of this polynomial: $$2x^3+4x+5$$

(a)  

What is the leading coefficent of this polynomial? $$2x^3+4x-5x^2-x^4$$

(a)  

Simplify: Final Answer should be in standard form

$$\left(x^3+2x^2+5\right)+\left(3x^3+4x^2-2x-1\right)$$

Simplify: Final Answer should be in standard form:

$$\left(5x^3+6x^2-4x-1\right)-\left(2x^3-3x^2-4x+5\right)$$