Review #2 for Ch 7 Test Polynomials

What is the sum of (4a³ - 8a - 4a²) and (7a³ - 7 - 6a)

Find the difference:

(x² + 5x - 4) - (- x² + 4x + 6)

Simplify the expression:
$$\left(3a^2+7a-1\right)-\left(2a-5+3a^2\right)$$

Find the sum:

$$\left(8x^2-2x+15\right)$$ $$+$$ $$\left(11x-2x^2-1\right)$$

Which expressions is equivalent to $$\left(-\frac{4}{5}k+\frac{1}{4}\right)-\left(-\frac{8}{5}k^2-\frac{2}{3}k+\frac{1}{2}\right)$$

Which expression is equivalent to $$\left(3x+2\right)\left(x-7\right)$$ ?

Find the simplified product: $$\left(4x-3\right)\left(4x+3\right)$$

Find the simplified product:  $$(x+1)(x^2-2x+1)$$

An expression is given, where $$a\ne0,\ b\ne0\ and\ c\ne0$$ .

$$\frac{6a^3b^2c^{4\ }-\ 8a^2b^2c}{2a^2bc}$$  

Which expression is equivalent?

^{An expression is given, where} $$x\ne0$$ . $$\frac{16x^4+8x^3-4x^2}{4x^2}$$ Which expression is equivalent?