(x³ - 5x² + 3x + 2) - (6x² - 4x³ + 3x + 5) is equal to:

1. 5x³ + 11x² - 2

2. 5x³ - 11x² + 3

3. 5x³ - 11x² - 3

4. 5x³ + 11x² + 3

p - (p - q) - q - (q - p) is equal to:

1. q - p

2. p - q

3. p + q

4. 2p - q

Separate the constants and variables from the following:

- 7, 7 + x, 7x + yz, $\sqrt{5}$, $\sqrt{xy}$, $\dfrac{3yz}{8}$, 4.5y - 3x, 8 - 5, 8 - 5x, 8x - 5y x p and 3y²z ÷ 4x

Write the number of terms in each of the following polynomials:

(i) 5x² + 3 x ax

(ii) ax ÷ 4 - 7

(iii) ax - by + y x z

(iv) 23 + a x b ÷ 2